LUCKY.
Pin the perimeter doors so you could do some basic automation with customers coming in and out of the house. Think lights rising, a nice background music playlist, things that will be noticed right away.
I would definitely upgrade the remote interface. The MX800 is OLD. Try a MX880 (almost the same price, same programming, color screen) or better yet a two-way set-up. Yes the MX6000 is nice (and expensive) but by the time the house is ready for electronics RTI might have their z-wave setups out which can of course integrate with many devices. I’m not an RTI rep or anything but their product is closed (unlike some competition) which is really important to me.
I would also at least wire for a keypad that (with the right control system) could control ALL the subsystems.
I wouldn’t worry about the 1080P projector. Save some money with 720.
Where is the head-end? Consider doing a flush-mount rack system in the theater if you aren’t already.
Any form of lighting control is going to be important.
I disagree with downgrading the multi-source multi-zone setup. A keypad that has choices and any type of source control is a huge selling point over a passive VC system. In my opinion any 4 zone system shouldn’t be using anything but. The Russound isn’t bad but you might check out Nuvo Simplese because it might actually cost less than a VC system.