Hey Chris,
I just bought a Yamaha 661. So I will be looking to purchase the Behringer stuff you recommended pretty soon. I think I will go with the Emotiva amp because to do 7.1 I would need 4 A500's. This seems the more economical way to go. Plus like you said, I'll only have 1 amp to turn on.
So, if I'm not mistaken, my hook-ups will be going:
1. Yamaha 661
to
2. DCX's
to
3. Emotiva amp
to
4. Speakers
Is this correct? Also, how many of each of those connectors and attenuators will I need?