Designing a 7.1 media room in our new house and would like your opinions on the speakers, subs that I am thinking of using. The room is 12' 1" wide by 22' 10" long by 10' ceilings. Equipment would include:

LCi-RTS105 (3) Front, Center, Right

LC--RTS FX (4) Surround Back Left, Surround Back Right, Surround Left, Surround Right

CSW155 (2) Front, Rear
SWA500 (1)

Receiver-Onkyo TX-NR905

Would using 1 Polk PSW 1000 instead of 2 CSW155 be better in filling the room with low freq?