BB4TB, congratulations on starting this topic. My Magneplanar 1.6QRs aren't biampable without a crossoverectomy, but I'm still interested. If I understand you correctly, one could use a 7075 for a high quality 5-channel system, with four channels used for biamping front speakers, and get about the same practical power delivery as using 5 200w channels plus better sound - assuming a good enough active crossover that wouldn't raise the overall cost above that of the 200w-per-channel system. Too bad Outlaw doesn't make one. Any suggestions?