You can have a look in the walmart.

I bought a brand new in the box chimney styled Broan 30" stainless steel range hood on Ebay for $300. Retailed for over $1000 at the big box stores.
Here is an unknown brand 36" 860cfm running now for $249 item nuumber 220287835038. That was the first one that came up on a search. Take a look at all of them.

Broan makes a great product. Look at their Allure line. Maxes at 450 CFM but at 300 or so, low sones. Sears has their model of the Allure III for under $300 and it is often on sale for even less.

You'll be fine--might have to wipe down the backsplash a little more often than someone with a monster hood. If what you have now works for your cooking style, then something that performs in the ballpark will be adequate.

I got a beautiful Vent-A-Hood floor sample for $600 - originally $1200. I know that's out of your budget but keep an eye out for the floor samples, some great deals to be had.

If you do alot of sauteeing, especially of meat, then I wouldn't skimp of the CFMs. We have a too-small vent now and every time I pan saute meat (one burner only) I set off the smoke detector. So annoying.

Thanks for all the helpful suggestions! I really appreciate it! I ended up going with a 400cfm Zephyr Breeze II for $320 on homeclick.com with free shipping. It's over budget, but I wanted a reputable brand and Zephyr seemed to get a lot of good reviews. The name "Breeze" doesn't inspire a lot of confidence though, does it? My husband joked that we all we can afford is a "Breeze", since the Zephyr Cyclone and Hurricane lines were out of our price range. Lol!

Just noticed I had a typo in my original message. It should have read, "I am now thoroughly confused" (instead of "not thoroughly confused") Big difference!

Ha! You should share your husband's joke with Zephyr's marketing department--they might want to rethink that name!