The RME ADI-2 FS.
Been looking at it for a couple of months but need to save a few pennies first.
The topping stack will stay and I hope to add the RME as extra.
I did start looking at the chord Qutest as I quite like the sound of the mojo but hate the design and battery life is annoyingly unpredictable. Then came across the RME, and then the denafrips Ares came to the party. However being as it will be used 95% for headphones the RME is still ahead.