Craig, I think you'll be pleased with the improvement when pushing 5 Speakers. The Denon is an excellent unit all by itself, no doubt of that, but driving 5 Channels (I use a 60Hz Crossover) I found it strained a bit at higher volume. The 755 gave it an effortless sound with 5 Channel, one way to explain it is that 5 Channel with the Outlaw sounded like 2 Channel with the Denon. I beleive on 2 Channel the Denon 3805 will put out 120-130 WPC however at 5 Channel that drops to about 80-85 WPC. Thats still lots of power but with a steady 200 WPC with the outlaw thats over double, easily audible. So far I am very pleased with the Outlaw 755 purchase. You can expect 200 WPC accross all 7 Channels, you'll notice a difference for sure.