If you run all of your wire through some sort of conduit, you can easily pull more if you need it. I would make sure you know where your sub will be and un separate power for that. Also, wire for 7.1 because you never know.
IMO think off:
how power will be supplied, Satellite, phone, Video, TV placement and power, HDMI cabling, componet cabling, stereo cabinet placement, pull wiring for second and third zones, run a powered FM tuner to attic, pull RCA cable to sub location(s), lighting, window treatment, run pvc conduit and place wires inside, run zone wiring to deck, and where is the beer fridge??