For R2R DACs here is my opinion on some of the options:
1. Audio-Gd. Not impressed. Not impressed with their dealer either.
2. Denafrips: All their DACs are highly reviewed. I own a Terminator Plus and a Gaia DDC. I love them and working with Alvin from Vinshine Audio is a dream!
Pick the DAC in your price range. You can’t go wrong.
3. Border Patrol: I went to the room with Border Patrol at AXPONA and I was impressed. Also not terribly expensive. Definitely worth considering.
4. Also agree that Holo Audio’s DACs should be considered.
You have some very good options at different price points.