Hi, I would appreciate some suggestions for rear surround speakers to move to 7.1 from 5.1. Current system: Amp: Pioneer 2011 Fronts: Cyrus Stand Mounts (Can't remember model) Centre: Mission m7c2 Sub: Mission ms10as Sides: Mordaunt Short 506 I would like to spend no more than ~£250.00. My viewing room is rectangular, with the TV in the middle of one of the shorter walls. The listening position is 3 feet from the back wall. I would have bougt the Mordaunt Short rears had they made some, but they don't. I will probably upgrade the fronts to Mordaunt Short 502s, ditching the current sub. TIA, Nick.