The Oppo looks like a decent choice, but you would be paying for a DAC your don't need. For me, the deciding factor would be whether it digitizes the analog inputs. I'm not sure if it does. You would be giving up the dac in your Ayre and running your records through digital processing. I would pass if that was the case.
If it were me, I would consider using long IC's and just put the headphone amp within reach. Then you could just get whatever you want. Worry about sq and not features.
If it were me, I would consider using long IC's and just put the headphone amp within reach. Then you could just get whatever you want. Worry about sq and not features.