Hello - first post in this forum. I have a fine pair of Castle Durhams that I am fond of. A cheesy little Tanoy centre and rear set and a Yamaha 5.1 pre amp and Rotel power amp combo. The centre has always struggled to keep up with the durhams (despite the pre amp holding them back by 10db) and is long overdue for replacement. A new Yamaha 5.1 reciever amp is on the way. My dilemma is... Should I look for a Castle Keep 2 centre and upgrade the rears OR start over on the speakers with something like Q Acoustics 2000i or 7000i or Monitor audio MASS 5.1 set ? TIA for any help or advice. Chris.