I've just bought a Danon AVR2805 and now need to get some rear speakers to fill in the gap. (I'm currently running 5.1) I might consider replacing my current rears (Kef coda8s ) if it's worth it. So........ Rear backs and rear surrounds. Do I need monopolar, bi polar, dipolar or any other polar that may be out there I'm, looking at maybe £200(ish) per pair of speakers, might go more if they're worth it. Any suggestions?