Plasma is not quite ready for prime time.
I most definitely agree.
I am curious though. Didn't you say you live in an apartment? Why the need for a big screen?
Yep, I live in an apartment. The reason for wanting a big TV is I have the room, I like to watch movies, and I have a few console systems. Plus, I just want one.
Are you one of those guys who sits in the front row at Matrix/LOTR looking straight up?
Not in the least; that's a good way to get a headache.

I think around 50" for a TV is reasonable.