Help Me Build my Home Theater room

I bought a bungalow. I will be adding a second floor for bedrooms. It closes April 07 so I have a lot of time to prepare for everything. The garage has been excavated and is the future theater room. Size is 24L x 20W x 8H. Two of the walls are foundation walls and ceiling is the garage floor - all concrete. I will excavate the room to put tiered seating in, therefore the front of the room will be close to10 feet tall (screen is going here) and going to the back and the entrance it will be 8 feet tall. The door size is 5 feet. Do I put 2 2'6" doors or one 3 foot as the entrance? I want the room to be as soundproof as much as possible. I have bought motorized berkline leather seating. Two rows of five and the back row against the wall will get a sofa. I bought RBH T3 speakers T1 centre with the SE66 surrounds. I will be buying in wall SI 760 for the rear to make it 7.1. I want the walls to be wood paneling (Oak). On the sides I will build columns to accommodate the side surrounds and in the lower section the 1010 SE bass speakers. These columns will be aprox 7 to 8 feet from the back of the room (SE 66 mounted on these) and another set of columns 14-15 feet from the back of the room. How high should I mount the SE 66 from the floor up? These columns will also have lighting in them. I am looking at the Bryston amps. Three 7B sst for the Left Centre and Right and a 9B sst 4 channel for the rear (SE 66 and SI 760). For the processor the Bryston SP2. I am impressed by the fact the 5.1 is balanced outs but the rear two channels use RCA non balanced as outputs. Am I being to concerned about this? The subs have there own amps SA 400. Can anybody suggest anything else? I an looking at 1080P projectors but I can't decide any help and info? Also any info for Screens Curved or flat? I want to project 2.35:1. I want a 120 inch screen. I will be going to Cedia in Denver next week to look. I also want everything to be automated Crestron Amx Elan I want the system to control lights alarm thermostat curtains etc again need Help? The house has 400 amp service and I will also have a dedicated room 7x12 for all home run cables and all the equipment to be stored in. This is my first time doing this and I plan on living here at least for the next 30 years so I want to do it right the first time. Any and all help is appreciated

Thanks Zisi