Get the Denon and the SVS as long as you don't mind having a water heater looking sub.
Denon makes better electronics than Pioneer. Denon has a far better reputation for having excellent dynamic headroom and good cooling systems than Pioneer. Even Pioneer Elite I find struggles with low ohm loads and high volumes. A 5000$ receiver shouldn't do that!
As for the SVS, at its price point it out performs anything else. However, they might not be aesthetically pleasing to you. Take a look, if it looks good to you, then buy it.