Check with IKS, International Kitchen Supply. They have a white Shaker Style door. The advantage of Shaker style is that you can dress it up or dress it down, depending on the look. The paints meet the California standards and you know Cali is always difficult to please. The boxes are 1/2" plywood with doors solid wood (maple). The center of the Shaker is MDF as it paints up better. MDF is not like the pressed board of old. They use it for exterior sheathing, roofs, and much more, but it paints up wonderfully. Oh yeah, they are RTA and easy to assemble. I think their website actually has a few videos on how to assemble them.
When I worked at a kitchen place before, we used them. They had contracts for over 8 years and still the cabinets are in great shape. That says alot. They are made in China, from I think, American grown maple shipped over there which is then cut and painted/stained then shipped back in flat packs ready for assembly.

Ikea is the best bet for what you are describing. With creative design, you shouldn't need any custom sizes.

Barker's Cabinets are frameless RTA's from the PNW. They offer free shipping to the Lower 48. They started offering two whites in January 2013 (dover white and pure white). They just started offering a medium stain for their woods this September. They also offer clear-coating.

We were impressed with our sample cabinet. They are plywood cabinets.

Just take care with the doors. They recommended alder for my sample painted doors - and it is VERY soft. Too soft.

If you have an IKEA nearby, that's a great option. There are companies that will sell you doors/panels to go with them if you don't like the IKEA options.

We're just finishing a DIY install of RTA cabinets from The Cabinet Authority. Could not be happier with the customer service, quality and cost.

It has taken WAY more time than we thought it would though. Do have have the time available for a vacation home in another state? Do you want to spend your vacation time working on it? If so, it's very rewarding to see it taking shape as you go. If not, hire it to be done.

Thank you all for the ideas. I think Barker, Cabinet authority and IKS are all framed cabinets - am I mistaken?

We may end up with IKEA. But I would like to have other options, especially if we need a special cabinet type/size that IKEA doesn't have.

We're probably going to DIY out of necessity. DH was laid off and is essentially retired now, so he has the time and the ability, but funds are limited. Heavy jobs will probably be farmed out to local contractors. We've had the house for over 20 years so we are used to spending our vacations working. LOL.

Another option to throw into the mix: I'm also looking for frameless and a local cabinet shop has had great things to say about Cabico's Espresso line - Cabico itself is custom, but they started a Semicustom line awhile back that is frameless. The shop that recommended it to me also carries much nicer stuff - Plain & Fancy and the like, no Chinese junk. The reviews here on Espresso are few and mainly dated, and at least one recent poster has raised questions about the hinges. But since we don't have a DIY option (small space, small kids etc) I'm hoping this works out for us. I hope to have a quote soon, and since I've priced out Ikea and Barker, I may be able ballpark them versus one another.

One thing to keep in mind about ikea--since everything is priced a la carte, it's easy to combine parts from different cabinets to make some sizes they don't sell. If you need something not in their line, ask over at ikeafans or ikeahacker.

We have Barker's. They're frameless construction, not framed. They go together much like Ikea's (which I have had before, and also like as a great value at their price). Barker's have some traits I prefer over Ikea cabinets: highly customizable sizing; online ordering (I can check my own dimensions...over...and over...); plywood boxes and drawers (very nice drawers); good, strong Blum drawer slides and hinges. I'm very happy with my Barker cabinets!

Ikea is also frameless.

Islandlife, do you have pictures of your Barker cabinets? Steph2000, thank you for letting me know that Barker cabinets came out with two white paint choices in January 2013. I really want frameless as I have a small kitchen.

What about basic white cabinets at Home Depot?

Here is a link that might be useful: Heartland White

We just put in IKEA cabinets and DIY'ed. One thing that was nice that I hadn't thought about ahead of time was the ability to return things. We had a design and it was all thought out, but we still ended up changing a couple things at the last minute after we saw everything in place, and it was very easy to do that. We modified the depth of a couple cabinets too, and it's really not hard. I'd play around with your design and see if you can get IKEA to fit what you want.

IKEA has a new door (Orsa) that is birch and more traditional shaker looking and it looks very paintable.

wolverine - did you return Ikea cabinets that were already assembled?

clg7067 - The HD cabinets may be worth a look. Thanks!

islandlife - I will check Barkers again.

Lynn2006, I can't seem to post pictures here (uploaded to Photobucket but can't get them to show up in a message). I'll keep trying. Some pictures are actually on the Barker website, under 'Before and After' - these are my pictures but the color toning isn't great. They're alder cabinets with a stain we applied to make them slightly reddish (trying to match our douglas fir doors and windows, and it is quite a good match). These pictures include a deep drawer that easily holds a heavy load of glass jars with grains. Ours are holding up just fine, but Barker has since upgraded to an even heavier-duty Blum drawer slide.
The drawers came unfinished, and I finished them with Osmo (also what we used for the cabinet doors).
Even though alder is a relatively soft wood, ours are showing no particular wear in our house of two teens, dog and cats.

Islandlife, I'd really love to see you post a reveal thread. And any feedback about Barkers would be so helpful. They are one of our top 3 contenders.

How long have you had them?

I did return one already assembled cabinet to IKEA. (We changed our mind about the range hood height). No problems whatsoever returning it. We also damaged one little part of a cabinet when we were installing and dropped a drill on it (oops), and I took that piece back and they replaced just that piece. I've also gotten random little bits of hardware from them (free of charge).

We also overbought cover panels and toe kicks and returned what we didn't end up needing- nicer than wishing you had it and it not being there.

The IKS Classic White Shaker is a framed cabinet. Birch wood, MDF center, 5 pc. drawer, Undermount glides, upgradable to full extension drawers and soft close, 6 way hidden hinges, CARB II certified, Frosted glass without mullioned doors, clear glass coming soon, interior painted white and the base cabinets are pre-drilled for pullouts.
The plywood boxes are 1/2" plywood.
These cabinets are much better made than IKEA.