Upgrade advice for processor

I am looking to upgrade my surround processor. My current processor is a Rotel 1068. I am currently considering the Classe ssp 300 or ssp 600 or the Anthem D2. I would like peoples advice and opinions on these or other processors with a budget up to $3500. HDMI would be nice but not a necessity 2 channel sound is the number one thing I am looking for in the upgrade. Not that the multi channel isn't important to me but I am really looking for high quality 2 channel performance from the unit. Thanks in advance.