Backwash
++1 Soix, EVERYTHING matters
If you are on the DAC upgrade path, I doubt you could do better than a Denafrips Terminator Plus DAC (NOT the Terminator II as the Plus is a large upgrade).
There is one right now used for $4,900 on US Audio Mart, which has a list price of $7,600. It is a little over 2 years old, so the model has many of the latest upgrades....and the firmware is upgradeable via a flash. Also the unit has a 3 year fully transferrable warranty, so has a little under a year left on the warranty
If I had the money, and the DAC was my next upgrade, I would buy that unit (and I am a long time Denafrips owner of several of their products)