If you can find one in the store, go to office depot and look for the Soyo 24" monitors that say 5ms or 6ms on the box. Anything faster is a TN panel. The ones that say that and have a package date older than December 2007 are the best MVA paneled monitors out there you can get at a ridiculously low price right now.
Mainly because while the monitors are outstanding, Soyo had bad quality control and many monitors shipped with bad pixels/screens. If you get a good one, chances are it'll stay good, my two have. Call around to your local office depots and see if they have one in stock.
There is very LARGE thread on hardforums about this monitor and a few decent size threads on these forums as well to get some input on this monitor. The best thing about this monitor is that is has a very very very low input lag. Most MVA panels if memory serves me right has about a 2 to 4 frame delay. Meaning if you took the same output to a CRT and to a MVA panel, you'll see the same frame on the LCD 2 to 4 frames after you saw it on the CRT. The Soyo has less than a 1/4th of a frame delay, which means you can't tell even when gaming there is a delay. The input really isn't big deal though unless you are gaming. Still, if you can get a good MVA panel for cheap without the delay why not go for it?