Hi MikeS, I also had the choice of the Pio 812 and the Onkyo 501 and went with the Pio. It also has a 100hZ crossover. Its very good with movie soundtracks but some people don't think its good with music.
I gathered this from browsing reviews: Be wary of Amplifier ratings. The Onkyo only pushes out 35 Watts/channel with 5 channels driven into 8-ohm speakers according to tests. The Pio may not be more than 60 Watts/channel. Harman Kardon tend to be more realistic about their power ratings. Try the Home Theater Forum for more ADVICE/INFO.
