I have three digital sources

I have a 4 year old Audio Note dac 2.1. I used to think it was a pretty solid piece of gear. Problem was when I bought a Cambridge Audio dacmagic to mostly stream mlb baseball games from my pc. Trouble started brewing when I hooked the dac magic to my Accustic Arts transport and it was every bit as solid a performer or even better than the Audio Note dac.

Then indignities on top of indignity I bought an Oppo 83se as a blueray player and to play sacd, and it clearly is in a different league (as in better) than my Audio Note dac and dacmagic on anything it plays. I run two systems - one computer based and one with the oppo as source. The Audio Note is the odd piece out but have been thinking should I upgrade to 3.1 (I run Audio Note HE speakers that I love in my main system), should I sell up and think about a newer technology dac that will mate with my transport or computer better, or even wondering if I just need to roll some new tubes into the 2.1 (I still have all original tubes). Just looking for a little discussion about where to take my digital sources.