Why would you run a digital out from your Oppo 103 to the Outlaw 990, as doing that uses the DACs in the 990.
Just so I could compare either choice; the 990 vs. Oppo. I mean, the 990 has a wealth of connection options, so why not try them all?
Also, by using that option,(coax), I could compare it to the same setup (coax) out of my Rotel 1072 CD player, (I also had that unit connected thru analog inputs)...