I have Energy c5 speakers I've bought for front channels. I'm going to be using a projector and screen, so I don't need the center channel to be shielded. What I'd like to do is just get a thrid c5 and use for the center channel. Anyone see anything wrong with that? Also, as far as a subwoofer. Are there any situations where using a sub would give you a less accurate sound or even less bass? I guess my thinking is, with a more powerful center channel perfectly matched with the side channels, it would have less need to compensate with a sub.