I got the R26 this week. Not that impressed with it. Tried it against my various other equipment...Aries 12th, Pontus II, Ladder Schumann using a variety of streamers and amps. It sounded veiled, lacking dynamics and loose bass. All the others were noticeably better.
When I got the A26 a couple weeks ago I was actually pleasantly surprised. It sounded really good. It was just my preference for R2R that made me decide not to keep it.
I know the R2R DACs take time to settle in but the Aries and Ladder DACs are also recent purchases with only a few days of use so far....
Anyway for those looking for an all in one streamer DAC I would definitely go with the A26 over the R26 based on the initial experience with them.
Of course there are lots of other brands to consider. Matrix Audio I2 has not been mentioned but is in the same price range and that has a decent headphone amp and wifi built in.