SC61 since it has the D3 amps and certified 4 ohm compatibility. And whether a Denon is better or not depends on your preferences.
Some here think Audyssey is the ONLY room correction software that is any good since it EQs the sub.
There are of course many that like MCACC from Pioneer for its tweakability and customization options. Only you will know what you like in your room.
Klipsch RF-62II, RC-500, RS-400, SVS PC12+,
Def Tech SC8000
Harman Kardon AVR 1600
PS3, Apple TV, Sharp 70" Qattron