Anything NEC will generally work (minus one run of monitors that didn't work with Macs well, but NEC did make an offer to change firmware as far as I know).
DS-263N is what I use. Awesome 25.5" Doublesight has a 27" as well which is *VA, but I have yet to see a review of it. The Planar PX2611 is also a good monitor...
If you're in Europe, Hazro also makes some good monitors.
The LP2475W is probably the best budget monitor for the money IMO that is still produced, which can be had for ~530 w/ shipping from Provantage. Otherwise, for a full colour gamut on-the-cheap, there is the Dell 2209WA.
Still, what it boils down to is what apps you will be using most often.
EDIT; Some guys over at [H]ard recommend the Auto-detect function on the monitor be disabled; there's a slightly greater chance of the monitor bricking with it on then off. I personally don't think its significant, but just putting it out there.