The only difference I sense in the sound is that the M60's sound better and bigger. The M2 sounds nearly as good the VP150 at the center although the soundstage seems very narrow.

If I were to add a second center below the TV, it would be around 8 inches in front of the 150 on top of the TV. Would the distance option in the reciever remedy this or are there other precautions I should take when integrating it?