I had planned to purchase the 950/7100 combo the first of this year. As a Christmas present from my family I recieved a Harman Kardon AVR630 reciever. Not a bad receiver but now that I have some extra money I would like to use the AVR630 as the preamp/processor an upgrade power to the 770 amp. Does anyone have comments or feedback on trying to use the HK AVR630 receiver as a preamp/processor with the 770 amp?