yep crt is better for gaming. But if u got some money to waste then go for a big, good quality lcd. U don't want to be carrying a 21" crt to lan parties.
Well sometimes I just take a 17", but it kinda sucks looking at a 15" when u are used to the 21".
the lcd's have improved alot, and though no lcd is as good in gaming as a crt, the difference is quite small.
But if u got the space on ur desk and don't move the monitor alot then a crt is fine.