Are you certain that you'll need a 50' HDMI? I'll admit that I don't have much experience with distances that far, but 50' is pretty darn long. Do you have a shorter path? Have you measured it?

The rest of it looks pretty good to me. Pretty much what I would do for myself or my clients.

Originally Posted By: K447
Downside is gauge and number of wires running from the central AVR out to the speaker locations...

Just wondering what the downside is that you're referring to. Is it the size of the bundle? The cost? For the fronts, 16awg will be plenty. It's probably fine for the rears too, but 14awg shouldn't be too pricey for the amount needed...
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Matt