MacWorld has just done a series of reviews on six 20" widescreen LCD monitors. These aren't the uber-expensive monitors for graphic professionals, and the review doesn't even include what has been my monior-mainstay: the Dell UltraSharp line. So I guess these would be considered value monitors geared more towards the consumer. Personally, I'm more worried about having a quality monitor for my video and less for my computer work-space. As long, as the color is decent, and the graphics crisp, I'm usually fine with my computer display.
With that philosophy in mind, it looks like they identify a couple of good monitors with words like "affordable", "inexpensive", and "effective" featured prominently in the reviews. The NEC MultiSync LCD205WXM monitor scored highest with a rating of 4 out of 5. The Dell E207WFP LCD monitor (not an UltraSharp) and the Samsung SyncMaster 206BW LCD monitor both got a rating of 3.5 out of 5. Also below I've thrown in some links to a HP 24" monitor (rating:4) and a ViewSonic 22" monitor (rating:3) that MacWorld has reviewed in the last 6 months.
NEC MultiSync LCD205WXM monitor 4 mice
Dell E207WFP LCD monitor 3.5 mice
Samsung SyncMaster 206BW LCD monitor 3.5 mice
BenQ FP202W V3 monitor 3 mice
Envision G2016wa LCD monitor 3 mice
HP w2007 monitor 3 mice
ViewSonic VA2026w LCD monitor 3 mice
HP LP2465 flat panel monitor4 mice
Large wide-screen LCD display offers good value
ViewSonic VX2245wm ViewDock monitor 3 mice
NEC Multisync LCD225WXM
Mac Life looks at the 22" NEC (the bigger brother to the 20" NEC that MacWorld likes) and gave it a 3 out of 5 rating. Good for office use, but not much beyond that. Complains about banding in gradients--ew, that's not good. Makes you wonder if the 22" performs worse than the 20" or if Mac Life has higher standards than MacWorld.