I also had a PE AVR powering a two-channel mostly music system. Altho rated at 5 x 100w, it had trouble powering my efficient (90db) Naim Arriva floorstanders. I replaced it with a 70w/ch HK integrated, which did a much better job--more oomph, especially at the low end. For what it's worth, my usual retail dealer, who carries PE as well as Yamaha and Arcam, always touts Yamaha, which he thinks has more juice and presents more naturally.
I also currently own a PE DV-47a, which I like a lot, and I've found it sounds significantly better and more detailed when I use its analogue, rather than its digital outs.
In general, you're probvably better served by following the conventional wisdom and using an integrated for music--less circuitry and electronic junk to sap power and muck up the signal path.