Ok guys, I've been looking for quite some time now for rear/surround speakers. I just upgraded to a Onkyo TX-SR608 7.1. My options are narrowed down to Polk RM7's or RM8's. If I go with the 7's I'll be in 5.1 and point the speakers at the seating area; pretty simple and straight forward and economical. Option B is get the RM8's with are spaced 45* apart. So my question is 1- can I run two channels (7.1) to the RM8 and 2- how do I correctly position it to the seating area??? Am I correct to say the RM8's are Bipole/Dipole speakers?