I received my email confirming 7100 ready to ship. I currently use a Parasound 855 to power my front and rear 5 speakers. I use an old Denon stereo receiver to power my 2 back speakers for 7.1 My issue is I really like the sound of my parasound amp and it powers my 950 and paradigm 9's and mini-monitors nicely. But I am considering upgrading to the 7100 for all 7 speakers. Or should I purchase two M-200 to power my mains. I am worried that it will sound different if I mix it with the 855. Any suggestions?