I'm turning to the dark side!

[Dieselboy]

I'm really getting into the idea of going FP now instead of plasma/LED, but I'm very new to the subject. My 'throw' distance is about 12 ft. from where I'd mount the projector to the wall where the screen will be, what size screen should I be looking at? Also, it seems that 1080p units are attainable for about $1000ish now, well what is the advantage to going to a $2K or a $5K unit? In other words, what are the features/specs I should be looking at that dictate a price range? Also, what screen materials/technology should I be looking at and how much should I expect to pay for this as well? I'd like to stay around $2,500 or less for everything since that's about what I was expecting to spend on a new plasma/LED display-

This is going in a dedicated HT room where I can completely control the light too fyi- See gallary