RBoster,


I'm not sure using about direct radiating for the center rear.
I have tried the following:

I tried using an M3 of mine as a center back at my friends' place who has a 6.1 receiver (denon), and I didn't like it as much as a VP150 in the back. I found the M3 to not disperse the sound as well as the VP150. If budget is of concern, maybe you could try a VP100. The movie we used to test was the Gladiator DVD.

Hope this helps!