I just bought the second monitor down on this page. It's a Dell, it looks sweet, it's 20", it's 1600x1200 and has a 16ms response time! That's outrageously good, and especially at that price. It also looks awesome.
To be honest the only reason I bought that particular monitor is because it's the cheapest, however it does have an amazing spec. I saw a similarly priced LG monitor with a sluggish 25ms response time so I didn't give it a second thought. Originally I was gonna get a 17" LCD Iiyama monitor with an 8ms response time, but I was tempted by the 20"ness, and 16ms is still pretty damn good. I should be getting it on Tuesday, I just hope it doesn't suffer from any dead pixels.