Well, I think the #400 is classic and the #490 is a little bit reminding me of the 30's or 40's with the detailing shown. And you'll have to clean those little routed out areas. As far as the muntins go, If you are concerned with cleaning, you'll only be doing that every so often, but you'll be looking at the insert selection you go with multiple times a day. I'd let the look override the cleaning issue. Cleaning windows isn't that hard. Now if cleaning was an issue of taking down the doors, shipping them out, and waiting a week for the return, than I'd consider cleaning issues in my selection. "But that's just me" ;)

And here is my alternative response:
Cleaning, Schmealing! If you love the look of the muntins you'll love cleaning them!:)

Are you someone who will be irritated if you look at your pretty glass doors and the shelves that show behind them do not line up with the muntins? Because the optimal shelf spacing for storing items isn't often the same spacing as muntins.

Are you someone who really hates doing detailed cleaning work with Q tips and toothpics? Because you'll have to do that on your muntins once every 6-12 months or so depending on your environment and home's HVAC sytem.

Are you someone on the modern side of the transitional style or the traditional side of transitional? You can swing transitional either way depending on the lighting and other choices, but which way do you want your "bones" to lean?

What type of glass do you plan to use? That can make a big difference! A single pane of "antique lace" glass can look both modern and traditional at the same time, while obscuring the interior objects so you don't have to be so neat. Clear glass could actually look more modern in this situation! Muntins and ribbed glass done both horizontally and vertically could also look really traditional and modern at the same time. The actual glass itself is a BIG part of the equation!

I actually purchased sample doors in 400 and 490. Take my opinion for as much as you paid for it ;-), but I was not nuts about the 490 in person. It was fine, don't get me wrong, but it was not as pleasing IRL as I thought it would be.

What would I do? I (and I do mean "I") would get the 400 with the muntin option you described. But, be sure to heed GDs excellent (as always) directions about shelves, and make sure that the shelf lines up with the muntin or else use glass shelves (advice from Kelly's Kitchen Sync). And I agree with GD that glass is impt -- I would use "seedy" glass or heavily waved water glass.

490 with no muntins for me. The door is a little special and the muntins would take away from that detailing.
I think it is a fresher look to have no muntins. I might try a fancier sheet of glass though if it were within the budget. I love reeded glass, but think the lines would be wrong with the detailing of the doors, so would stick with a frosted, wavy or seeded type. Any simple glass would look lovely.

Thanks for all the thought-provoking questions! I am indeed the type of person who would be driven nuts by muntins that don't line up with shelves!

After looking at the cabinets installed, I realized that given my 5'2" height, the little routed lines on the #490 way at the top of a 39" door would be lost on me. Basically I'd only see them when I was up on a stepladder, cleaning them with a Qtip! :)

So as much as I like the #490, I think I'm going for the #400 with two horizontal bars, each 3-4 inches from the top and the bottom. I'm going to mock it up on paper to see exactly what the placement should be.

I think it will give it a "Mission-ish" look and the horizontal lines will be different enough from the (glass) shelves, that it won't look like I tried to line them up and failed (if that makes any sense).

I hadn't thought about glass type, so now I have a whole new set of choices! Seeded could be very pretty...

Thanks again - I'll post pictures when it's finally done!

I had 4 glass cabinet doors with muntins, and I actually switched them out for clear glass with no muntins about six months after installation. The lining-up thing drove me crazy. If I had it lined up with the shelves from one angle, all I had to do was step a few steps to a different angle and it would no longer be lined up. So I would vote against muntins.