Johsti,
The L&R is definitely higher quality from everything I have read. You will have to go into the audio menu section and turn off center and rears to devert all info to L&R (if you have no multichannel amplification for your audio). There has been some excellent tests over the years talking about getting the best sound from Oppo's and all have concluded that the stereo outputs are not as good on 2 channel analogue sound. I now have a Denon and apply the same techqniue on it as well.
The L&R is definitely higher quality from everything I have read. You will have to go into the audio menu section and turn off center and rears to devert all info to L&R (if you have no multichannel amplification for your audio). There has been some excellent tests over the years talking about getting the best sound from Oppo's and all have concluded that the stereo outputs are not as good on 2 channel analogue sound. I now have a Denon and apply the same techqniue on it as well.