Here is what I'm working with.
First off I have an Optoma HD20 projector and a 120" screen.
Room is 17 ft. x 22 ft.
However the seats are about 14 feet away from the screen with the rear of the room holding a full bar.
(2) Polk Audio RTI A9 Front
(1) Polk Audio CSI A6 Center
(2) Polk Audio RTI A3
(2) Polk Audio TSI 300
(1) Polk Audio DSW microPRO 1000 Sub
Should I run a 7.1 with my TSI300 as the rear sides and the RTI A3 as the rears? Or...I'm not sure if I should do this, but I know it would work. Run my RTI A9's and my RTI A3's as multiple fronts biamped with one set of speaker cables going to the RTI A9's and one set going to the RTI A3's to stick with the 5.1? I was going to get the FXI A6's as the rears but I couldn't pass up on the TSI 300's new as a pair for $200 compared to the $559 for the FXi's. I could really use some input! Also should i bump it up to a 5.2 or 7.2...would another sub benefit me?