I think you listed the + and minus yourself 
No doubt the panny will have the better sound, if you can live with 6.1 a good option.
If DVD-A interests you then the HDMI + Full Digital Panny will pull ahead of the Pio in leaps and bounds for Sound quality one would guess (as digital input is where the pannys truely shine, with some others on audiocircle testing some rare 24/96 DAD (or DCD or something) discs with an XR45 stating it sounding better than any SACD heard on other gear.
No doubt the panny will have the better sound, if you can live with 6.1 a good option.
If DVD-A interests you then the HDMI + Full Digital Panny will pull ahead of the Pio in leaps and bounds for Sound quality one would guess (as digital input is where the pannys truely shine, with some others on audiocircle testing some rare 24/96 DAD (or DCD or something) discs with an XR45 stating it sounding better than any SACD heard on other gear.