I'm not convinced by Plasma/LCD just yet. For me a GOOD tv AND a GOOD projector/screen are worth more. A decent DLP projector is just $2500 and has a much larger format than the most expensive plasma. Add a good motor driven projection screen ($500) and a ceiling mount for the projector and you've got the ultimate home cinema.
When plasma/LCD hits the $1250 range I'll look again, but considering a decent large flat panel runs around $12500 I'm going to wait a bit longer...