I agree with everyone that your room is probably a little too tight for the size of tank that you are hoping to have. A 36" deep tank will need some type of ladder or catwalk to reach into it and that will take some signifcant space from you.
Also, I was wondering why you put your sump as far away from the tank as you have. This just involves more plumbing, bigger pumps and more opportunities for problems.
Here is a good build thread for you to look at which shows some of the things you should look at.
http://www.reeflounge.com/showthread.php?t=24425
Otherwise, sounds great! By the way, how often do you have 24 people over to watch a movie? lol