I must be one of those few who find it really bothersome to have a minimal lipsych delay, even after trying all kinds of HDMI input/output suggested here and from Oppo technical support, downloaded fw didn't resolve the issue either.
I don't have the time to do further testing and don't feel like sitting on the player for a couple of months and have been issued an RMA by the kind Oppo customer service. My pre-release 93 will be going back on Thu. (it would be tomorrow but we are getting dumped on tonight, +12" snowfall).
I hope to read in the near future that the current slight lipsynch audio delay will be fixed on both HDMIs.
Edit: of course no beta tester will advise me of pending FW upgrades, silly me for suggesting otherwise.