Oh man, you're missing out on OLED in a basement though. It's so fantastic for dimly lit evironments that I'd take the smaller size any day, and just sit a little closer. LCDs, on the other hand, look pretty terrible in a really dark room.

The only thing that would make me pause is if you're trying to squeeze a big family around the TV. In that case, it would make sense to get a bigger one, so everyone can sit farther back without compromised viewing angles.