If you're a gamer and you want an LCD, the MOST important factor to look at is response time. 16ms is the MINIMUM a gamer will want in an LCD. 12ms or even 8ms is probably what you should be aiming for as a gamer.
Another thing to look at is DVI connectors. This should improve scaling to differant resolutions a little bit, as this often happens with gamers (alot of cheap LCDs have no DVI connectors at all! Make sure to look for those DVI connectors to improve scaling and image quality).
So if you are a gamer, and you want an LCD, look for DVI connects and response times (lower is better).
You can do a search on NewEgg and key-in on a specific response time... If I were you, look only at the 12ms monitors and pass on the 16ms monitors. As a gamer, lower is better.
Not sure what your price point is, but this
Viewsonic 17" LCD has a 8ms response time and DVI connects.
I just ordered a
Viewsonic VP912B 19" LCD for my gaming needs.
Also, don't budget your monitor, especially if you're a gamer. Quality is more important then size for a gamer. If money is an issue, get a smaller high-quality monitor then a larger lower-quality monitor. After all, you spend every gaming moment looking at your monitor, so don't compromise on the quality and end up with fuzzy streaking images!