I just picked up the Schiit Audio Bifrost 2, and the difference in my system was breathtaking (literally)! I am using that mated to a Brennan B2 which I used to RIP my cd collection. It is my first DAC so I have not auditioned or compared to any others. I did quite a bit of research before purchasing and all indicators were that Schiit was the way to go. I absolutely LOVE this DAC! I too had the AQ Cobalt and ended up selling it - but only because I purchased the Brennan and no longer need the Cobalt...
Best of Luck!
Best of Luck!