I just got my aperion 5.1 system and so far I've been pretty impressed with it along with my Denon 2803 system. But I've a question regarding surround speaker placement. In our listening area there are no immediate enclosing walls on the rear left and right. So, the speakers will have to be mounted on the rear wall and have to be turned 60-90 degress to face the listening area. For that setup these speakers look a little too big to be the surround speakers. So, I'm thinking of getting small satellite speakers just for the surround left and rear speakers in the rear. Since the rears aren't that significant as the fronts and centers, I feel it's ok to give up the mid-range in these. Am I wrong? Is there any disadvantage of this kind of mix-match of speakers? And in such a setup will the H/K 525, because of its bass management, be a better receiver than the Denon 2803? Thanks in advance. Ganesh.