I agree with Free Enterprise. Size matters HUGELY when attempting a Theater quality visual experience in you home.
If it just has to be a smaller television I'd look into the Mits 82inch DLP television. We recently bought the 60in model and the picture performance is outstanding. Of course, @ 60 inches it's just a television so when we want that HT feeling we got to fire up the projector.
I'd skimp at first on the experience for your ears (sound system) and focus on the visual experience for your eyeballs which, after all, is the core of a visual experience.
Best of Luck