I have a pair of Newton M80 speakers and an ensemble II set. I was thinking of using the M80's as fronts and the satallite speakers from the ensemble as rears and then maybe buying a cambridge SW's center and subwoofer. Just wondering what the general consensus is about Cambrdge SW? Also, I know that the M80's are much more efficient than those little ensembles. Would that be a problem in a surround sound system? I'm new at this so any info would be good. Thanks.