Thanks for looking. I have some thinking to do
I am assuming that this house is not yet built and that you don't have a ton of choices (as I didn't) on where you can move walls, layout, etc.
The advice I would give is to mock it up when you move in. I thought I knew exactly what I was going to build before we moved into our house but I've had a mixed blessing where I haven't been able to start construction. In the meantime, I've "mocked up" my theater with craigslist couches, a basic projector (BenQ) and a 12' wide DIY screen and an array of hand me down receiver / speakers. I think I've spent $1,000 or so and I've turned a completely barren space into a working (if not totally great) home theater.
I've discovered along the way that some things I thought were going to be REALLY important - aren't. And some things that I hadn't thought of at all, actually matter.
It all depends on you and what your style is.