I went from a Anthem 30 to a Onkyo prepro. The Anthem was a great piece, but its just too far behind in features I want. IMO the new anthem pieces are way too expensive. When they could be had around $2500 new, they were a much better deal and worth buying. My opinion.
The Onkyo sounds great. Movies actually sound better. If you are worried grab a used 2 channel preamp. I've seen some 5508's under $1500 used already. Compare that to a new anthem. At 5k, you can easily beat the Anthem for music & movies, even if you have to get a preamp, and a prepro to do it.