I heard about those thinner CRT's a couple months ago. The idea is that they will be a third thinner than regular CRT's and also a third of the price of LCD's and plasmas. That may be true for TV's, but not sure about it for computer monitors.
Earlier, you mentioned that you like to play games. You can ignore this bit of advice if you like since I am only repeating what I've heard or read, but the problem gamers seem to have with LCD is the response time (sort of like a refresh rate). One writer at the Inquire stated that LCD's were great for looking at stills, but lousy for watching anything with high motion. From laptop computers I've seen, there is a ghostly trail behind the mouse which can probably be attributed to this ghosting effect (slow response time). I've heard that LCD's are improving in this regard, but that will be true of the cutting edge expensive ones, as a general rule. The cheaper ones are probably slower, so you will have to do your homework separating the grain from the chaffe.
Yes, CRT's are big, but if you want the best (moving) picture for your money, they seem to be the way to go. LCD's still have a way to mature.
Also, I've seen some LCD's with blown pixels. The pixel looks bright grey and is annoying as hell, sticking out like a sore thumb. Check with the seller about the warranty and if they will repair bad pixels i.e. if its covered.