If I were you, I'd add a good DAC. Keep the Oppo and use it as a CD transport and your DVD player. A good stand alone DAC will be a big improvement over the Oppo by itself. Some of the DAC's that I see most frequently mentioned in these forums are:
Auralic "Vega", Mytek "Brooklyn" and the PS Audio "Direct Stream Jr or Sr."
As for the digital cable, if all your cables already match then "keep it in the family." If you've got a ,mixture of cable/interconnect brands, then God help you in that search!
Good luck and I hope you find what you're looking for (and without too much effort or frustration).
Auralic "Vega", Mytek "Brooklyn" and the PS Audio "Direct Stream Jr or Sr."
As for the digital cable, if all your cables already match then "keep it in the family." If you've got a ,mixture of cable/interconnect brands, then God help you in that search!
Good luck and I hope you find what you're looking for (and without too much effort or frustration).