Your room isn't perfectly square which is good/better for acoustics. Most theaters are rectangular but you have plenty of space and could do some cool things. I'd for sure want some sort of A/V closet.
|Originally Posted by dc_pilgrim|
There is an excel based room calculator on Terry's site tmlaboratories.com (scroll down to free goodies). I didn't drop your dimensions in there, but I am guessing it will have some mode issues.
EDIT - if you are doing two rows of seating, I'd strongly consider a PJ. Spend a little time here, and you can learn the basics. Don't rush into a $$$ decision. Resale on tv's isn't very good.