I have both units also, a good combination for Video, Music and Movies.
I have experimented with the video quality from both players.
It is hard to beat the Anchor Bay chip set and video quality from the Oppo BDP 83, but the Reon is not bad in the Integra.
I found the best video quality is as follows:
Set the Integra to "Pass Through"
Set the Oppo to 1080P using the ABT Video Processing
I have a Pioneer Kuro 60" Plasma and the video is stunning. Even standard DVD's upconverted look great.
TS