I currently have a Sony TAE-9000ES. I am replacing it with an Outlaw 950 for the 7.1 channels, DPL2, DTS-ES, etc. I am currently using 2 Pioneer Elite M-91 amps (400+ WPC in 4 ohm) for the front three channels and a Pioneer Elite M-72 amp for the rear 2 channels. I have Kef Reference 3 for the front two channels, Kef Ref 200C center, and Kef TDM34DS for the sides, and now a pair of Kef 80S for the rear. I can split the M-92 into a 4 channel amp, but that will only give me 65 WPC to each of the 4 rear speakers. Is that enough (the TDM34DS have 5 drivers including a large woofer)? Do I need the extra power to the rear channels I would get from a 770? If you have a 770 what do you think of it so far?