Very large room HT

First you need to decide how much to spend on what. Do you need a blu-ray player? Is it just movies or 2-channel music too? How far back do you want to sit?

Anyway, maybe 10K speakers, 1200 OPPO dvd player, 1500 amps, 2500 processor, the rest on wires and room treatment (which you'll need).

Since you have limited choices for listening to new equipment, you may want to try something used from Audiogon, or a direct manufacturer with an in-home trial period. If it's Audiogon, you can always resell.

I'm a B&W fan, but they need a high-current amp to really sing. I'm not sure that best buy would have anything appropriate. There are always great options on Audiogon.