Whoa. Stop right there. Listen to the guy above me...
With $800, do you know what kind of CRT you could get? And what kind of LCD?

Granted, you can find many a 15" LCD for under 800, but there are reasons to stay away.
Against LCD:
Lower refresh rate builtin, meaning ghosting/blurring in any fast movement (DVDs, games, etc.)
Resolution also builtin, meaning any other one is going to look like utter crap.
For:
Much less room.
Coming down in price quickly.
Looks cool.
Looks aren't everything though. With eight hundred dollars, you could get a mondo, HUGE, 21" CRT. Nearly the best, if not the best. Of course, that will take up half a desk...