I posted a topic about this a while back. A lot of people will say CRT's are better for gaming but not LCD's are just as good. Just make sure you get one with a really good refresh rate. Check out my thread.
There are a few good LCDs out for gaming. It should have a response time of 8ms or less to be considered for gaming. Hyundai makes a good one. And there are a couple more with that response time. Pricey though. You can get a bigger CRT for the same money. I have the Hyundai Imagequest 19" and I paid around $350 USD. I love it though and think it was worth every penny.