I searched the forums but couldn't find a related thread. I have never owned a denon receiver but am now taking a hard look at the AVR 4806 vs the RXV4600. I use receivers strictly as preamps, though I might consider powering a 2nd zone with their internal amps. My current receiver the rxv750 was supposed to be a temporary stand-in until receivers with digital video switching hit the market. Now I'm at the upgrade point, and i was wondering if there is any major difference in DSP implementation between both brands, or should that even be a consideration when choosing?