I haven't personally compared direct with bipole/dipole speakers for the back surrounds in a 7.1 system, but the common opinion is, as you suggest, that direct firing speakers are more appropriate. So I'd think about M22 or (perhaps better) M2.


Greg
VP180, M80s, M22s, QS8(4), CSW S305s, EP500, Pioneer VSX-90
M2i, M3(2), Pio vsx-1020