CRT for sure
Whats your price range?
Check aroud newegg and you'll find alot of nice ones
You can get a 21" CRT for around $450, but you'll need a very good video card to actually play games at 1600x1200 and above
19" range from about $160 to $250, but have the max resolutio the 21" have, usually they top out at about 1600x1200 and run optimal at 1280x1024