Other than the remote to operate everything... That is a bomb setup. The real improvements at this point are:
1. Remote (once again a one touch remote that makes it so the kids and family can use it puts the system WAY up on WAF)
2. Room acoustics and treatment. Acoustical panels, hidden speakers, curtains, lighting...
3. Lighting, lighting, lighting. With a few years at a high-end custom installer and a few years at a high-end retail location I have discovered that the custom installer focussed and sold theater lighting much sooner than the retail dealer did. A minimum of one zone of lighting over every row of seating, add a zone for lighting over the screen area (so the lights at the front can be off, but you can still have enough to read the paper in the back). Wall sconces become another zone and add some dramtic lighting to the room. Plus, if there is a stair, then you use lighting under the stair that is dimable as well. That's a total of FIVE zones of lighting in a two row setup. Makes a big bang! You want enough lighting in there to make a room with dark walls and dark floors/ceiling to light up very well. About two-three times as many lights as are in your average room is required. They just get dimmed when not necessary.
4. If possible, run conduit now from the rack location to the projector location.
5. If using a Mid-Atlantic rack, make sure it is large enough to put one blank vented space between each piece of equipment in the rack. Overheating is a major, major issue in racks.
6. If you are going to put a fan in the rack, then put the rack in a different room than the theater. This is what I am doing in my house. The rack is in the basement, a second rack with the VCR/DVD/PS2 is in the family room. The rack stays cool and away from my 9 month olds sticky fingers, and the DVD is still right there to pop in Friday the 13th... or Barney, or whatever.
7. If you are using IR repeaters/IR equipment then don't put IR bugs on the front of the equipment. Bill the client an extra hour per piece of equipment and open up the gear and bury the IR emitter inside. It keeps the face of the equipment clean and avoids future hassle of the client knocking a emitter off and suddenly having a piece of hardware fail.
The equipment specified should make your client very happy - and you very jealous... as well as his neighbors. I will once again state: The remote is how he and his family is expected to use everything. If they have to remember more than about 2 steps to turn things on, or it isn't 100% reliable, then why did they spend the other $50,000+ on the theater? A Crestron RF remote starts at about $4,000.00 fully programmed and goes up from there.