As an owner of a Wadia, Bel Canto's and a 568.2 I would suggest that to get the best of both AV and music that you don't bother upgrading the 568 but use its L/R digital outputs into either a Wadia or external DAC for the front channels of your AV system. To get volume control of the digital outputs you will need to use manual 'typing' of AAA on the 568.

Regards
Gary