Brookstone projector + bose HT = fail.
First of all, if you are going to use a projector, use a decent one with proper mounting method.
If not, decent samsung or panasonic plasma gets my vote for home theater system.
I wont' go into the model# because I dont' want to break your 5 yr old piggy bank but around $1000 should get you a decent 55+" plasma.
For sound system, Bose would get my LAST vote...Cheap construction with no compatibility or connectability to AVR units.
For $600, as a starter, I would try Harmon Kardon 1600 AVR + Mirage Omni set up.
09 E92 335i Coupe
Jet Black/Coral Red/Sports Pkg/Prem Pkg/Cold Weather/Navi/PDC/Ipod/6MT