I love the Parasound that that you have, I don't really think you are going to get a huge leap forward with anything newer, unless you went way up in price. I think the 2205 sounds every bit as good as the A51 they make, and better than almost any multi channel amp I have heard. Amps have just not changed that much, unless you move to an ICE amp.
You could add a seperate front end amp for music and keep the Parasound for center/surround channels only??
You could add a seperate front end amp for music and keep the Parasound for center/surround channels only??