this is not about electrical outlets, but i have some advice for speaker boxes. if you had the chance to pre-wire some boxes that you can connect speakers too (particularly the rears), then i would do it. they make these already, so you can purchase them, install them and run the wires to them and to a place where you would put your components. connecting the speakers later. it makes for a nice clean setup, without wires running everywhere or having to be hidden. id recommend multiple circuits as well, also having one for your subwoofer, as a lot of nice subs today are in the +1000wt range.

using outlets with surge protection integrated into them would be a great idea as well, thus the lack of need for another surge protector. you could always mount a line conditioner inline with the power before the outlet, if that is something that you are concerned about.

its better to have too many outlets, than not enough... who knows what they will develop next for the home audio market...

also if you plan on having a projector, then an outlet where it will be mounted would be handy. also pre-run all the wires for it...