Points for the Onkyo.
1. It has HDMI repeater (processes audio)
2. It upconverts incoming signals like DVD and other SD material
3. It has HDMI 1.3, so it supports deep color and bitstream high resolution audio when it becomes available (Onkyo will be releasing their first HD DVD player that will output Bitstream Dolby TrueHD and DTS-HD Master audio)
4. Ease of use and setup (has audyssey's most recent auto-calibration)
Pionts for the Pioneer.
1. It is THX certified, not super important but helps ensure that you get reference level output in small to medium size rooms
2. It does have a slight edge on power to the Onkyo, but not enough to be that noticiable
3. It has preouts for all channels, so external amplification can be added (The Onkyo does not support this feature)
If you want the best of both worlds you might look at the Onkyo TX-SR705. It is THX certified and has preouts.
