My relatively low-rent HT approach: 2 Sony TA-N9000ESs in BTL (2x200 WPC + 1x115 WPC) mode. My 805s are on 200W channels, one on 1 amp, the other on the other. The other 200W channels are used for the surrounds (CWM 800s) The remaining 115W channels are used to biamp the center (HTM2)
I play 2-ch SACD directly from my S9000ES through a Creek OBH-10 to the extra 2-ch inputs on the amps.
Works for me.