The definitive HDTV buyer's guide?

If she's going for a thin monitor, the technology really comes down to size and preference. LCD seems to be a better deal under 42"... anything over that - plasma is a better value. I don't know if I've seen consumer LCD's above 50"... they get way to expensive to produce at that size.

Then it's just a matter of looking at different displays and seeing what you enjoy. I think black levels are not quite as good on plasmas as they are on LCD's, but honestly, I can't really tell the difference.