Better R2R DAC Recommendation?

My point of reference is limited since I have not owned many DACs, but as a recent owner of a Pontus II DAC connected to a Lumin U1, I am very satisfied. This seems to also be the take from this reviewer on hifi-advice.

I have a Pontus II and a MHDT Orchid. I like them both.
This reviewer compares the Ares and Pontus II. 

There's a Holo Audio Spring KTE version listed on USAM within your budget.
(no affiliation)

From what I've read, the Spring gets you about 80% of the May DAC's sound quality. As a May owner, it has been the most significant upgrade in my system over the years.

I have an excellent sounding MHDT Orchid which was modified, thus: 8 key resistors replaced and upgraded directly around the tube with a mix of Vishay Zfoils, Audio Note Tantalum non-magnetic and Shinkoh. Also replaced: output caps, changed to VH Audio Audio Vcap Odam 2.2uf. Total cost of DAC and then later mods: $1610

I have A/B'd it against the Denafrips you mention, and it sounds better. It competed decently with the Holo Audio May DAC, but the Holo was better. It is nearly $6k, however.

Second a MHDT.  I have the Stockholm II wonderful rich sound good bass