my 2 cents
the r26 is really excellent, one would truly need a mega system to hear significant sonic benefit to pricier dacs - i feel it strikes a wonderful balance between uber clarity and musicality, and it has very good spatial qualities
i would work on getting the feed into the r26 is clean and pure as possible to let it be at its best before getting on the dac merry go round (the front end improvements would benefit most other more expensive dac choices as well)
i use the r26 in a roon based system, it is truly excellent