So let's say I've narrowed it down to Denon and am debating between the 3803 (or possibly the 3805) and the 2803. In a living room that's 18 X 22 w/vaulted ceilings will the 2803 be enough power-wise, or is the 3803 absolutely necessary? As I stated in my last post, music will be the main focus (75%), and ht will be the rest. Thanks again.