Better R2R DAC Recommendation?

Some good alternatives:  Holo Audio May, MHDT Orchid, Denefrips Pontus, etc....

But, you can sometimes find the Schitt Yggdrasil R2R Dac in your price range.  I really like the Yggy, which gets great reviews.  I think I bought mine for around $1900...  

I doubt I'd trade it for anything less than the Denefrips Terminator, or Audio Mirror Trubador...

Strecht your budget a little bit to get a significant improvement.

I would say Audio-GD R8-HE Mkii without a doubt.

Whilst you mention the Streambox2 you do not mention the rest of your system.  I have a Denifrips Ares II and have no intention of changing.  I have tried other, perhaps better, DACs in my system that , to me, made no meaningful difference. However a Stack Link  certainly did.

I did a lot online research on this topic and ended up with Holo Spring 3 vs Holo May, decided to go for the May. If my budget was 2k I’d look for a used Spring 3.

AudioMirror is an excellent R2R DAC.