thanks guys...with the package savings, the price difference is not that significant between the 755 and 770...so i guess my mind is made up...i will set up what i have now and add 2 more speakers at a later time..wish i knew this before i gutted the room....maybe for now i will throw a speaker in the back for 6.1....i'm sure i will have many questions when it comes time to set this system up..cappy24