Have Mission 754 Freedom 5 fronts and 752 rears at the moment, the centre is a 75c. Got the chance to pick up a new boxed Kef 200c for £350.00 1. Is this a sensible upgrade - tonal match to 754's? 2. I understand the 4 ohm Kef 200c is hard to drive - will my meaty Karmon Kardon AVR8500 hack it? (The 754's are 6 ohm and the 752's are 8 ohm) 3. I have an old Arcam 290P power amp in the loft, would using this as a decicated power amp for the centre be a forwards or backwards step from driving all 5 channels from the AVR8500 integrated amps as I do at present?