Gen1 DLP projection TV's caused headaches (literally) for some people, and even with current- gen models, a "rainbow" effect can be seen, although it's very rare.
Toshiba DLP has been the best quality I've seen so far, with a VERY respectable price:technology ratio.
There are two other options- RP LCD, which isn't quite as bright or offer quite as wide a viewing angle, and LCoS (Liquid Crystal on Silicon) which is supposed to be cheaper and at least equal to DLP in quality.
My advice- bring a notebook and go to a Best Buy or Circuit City... or any other higher-end shops around (Tweeter isn't bad), and just take a look. Make note of the size, weight, capabilities (how many inputs do you need vs. how many will you use), color depth, black depth, brightness, and viewing angle. Also bear in mind viewing distance is important to the size of the screen you get. If you're sitting 4' away, a 60" TV will be a waste of money.
