I'd go for the LCD.  After using LCDs for over a year now, I can't stand sitting in front of a CRT for very long.  I have the Dell 1800FP and I definitely wouldn't trade it for a 21" CRT. 
I used to run my CRT at the highest refresh rate possible, but my eyes would always hurt after long session in front of the computer.  I get the same feeling from sitting in front of the TV for too long.  I found that with my LCD, I don't get that anymore.