If you want good two channel music results combined with the ability to do home theater, do not use a surround processor as your main preamp. Get a real analog two channel preamp (preferably one with a processor input) and a separate surround processor.
Any surround processor will be compromised as a two channel preamp because of all of the digital garbage sharing the same chassis and power supply.
Any surround processor will be compromised as a two channel preamp because of all of the digital garbage sharing the same chassis and power supply.