If you can afford to spend more then the Samsung Touch Of Color T260HD 25.5-Inch LCD HDTV Monitor looks great. It is a larger screen but not too big and it supports a resolution of 1920 x 1200. Brightness and contrast are good and the response time is 5 milliseconds. There are loads of connectivity options including two HDMI ports and it looks really stylish as well. The drawback is that the list price is around $600 but you should be able to find it a lot cheaper than that ($350 on Amazon with a $100 rebate). The 20 inch model is around $250.
The Samsung SyncMaster 2333HD 1080p Widescreen LCD HDTV is another great option and for $350 the 23 inch widescreen display offers a resolution of 1920 x 1080, a response time of 5 milliseconds and good contrast and brightness. It also has two HDMI ports and built in ATSC/NTSC tuners.
These are some of the most popular options on the market but there are plenty more out there so take your time and shop around to get the device that suits you.