I have opportunity to aquire some Polk rti 10's fairly cheap and am wondering if anyone has used one as a center channel lying on it's side. Any thoughts? It would obviously be a little overpowered as a center but would be matched perfectly to the a/b channels. Honestly, for the price I can get them for I can't buy the actual matching center(csi5). At the same time I don't want to use it that way if it's going to suck as a center.