I'm in the market for a new 5-channel amp. I think I've narrowed the list down to a Parasound Halo A 51 or a Anthem Statement A5. Has anyone had experience with one or both? Thanks. (FYI, I'm currently using a Sony STR 6400ES to drive a pair of Martin Logan Theos and Energy surrounds. I plan to use the Sony as a pre/pro for a while after I buy the amp.)