@kairosman Nothing more exotic right now alas. My only point of comparison was a head-to-head with a similarly priced and since returned SMSL AK4499 VMV D2 DAC last year, which the R26 beat handily. Oh and a Topping E50 they both destroyed. R26 & D2 were using the Zen/U18, Roon/HQP and an Ock-1.
All I know is that my R26’s sound has improved out of sight since then with network chain improvements, better external clocking and signal grounding (I can’t recomment Quartz Acoustics Premium grounding boxes highly enough). If the ’stock’ I2S input R26 YT reviewers compared favourably with R2Rs up to maybe the level of the Pontus/Venus and the Spring 3, then I reckon (he says, perhaps a little optimistically) in my more optimized setup it’d now surely soar well past them, if perhaps not quite as far as your Baltic 4...