Arafiq, I read the stereophile review on the HK990 suggested above. I have no familiarity with this piece, but it got a very nice review and was used with some pretty nice equipment. My guess is this is a pretty good recommendation.
I also have no familiarity with your Onyoko. My guess is the apple tv is the weakest link. If it were me, I think I would still go with the OPPO upgrade first, but its really just a guess. I have about a 50% chance of being right.
I also have no familiarity with your Onyoko. My guess is the apple tv is the weakest link. If it were me, I think I would still go with the OPPO upgrade first, but its really just a guess. I have about a 50% chance of being right.