I used to play competitive FPS games and CRT monitors are way better for FPS. Only recently have they been surpassed in visual clarity with the strobing backlight 120Hz LCDs, but they still win on input lag (having pretty much none).
I used a 19" CRT for Call of Duty 2, then I got a 24" Sony GDM-FW900 CRT for Dragon Age Origins / CoD4 in 2009. The transformer on my 24" CRT died about 2 years later, so I got the 22" off a friend and then a few months later found another secondhand 24" GDM-FW900
I absolutely use the 22" solely for low resolution gaming. It's great.