DAC Choices - $5,000 to $7,000

What are the current top DAC choices in the approximately $5-$7K price range (new or used) that I should look at as possible upgrades to my current Metrum Adagio?  Having an on-board volume control is not a factor as I can operate my system either way.   If I wanted to spend more I would look at Totaldac, Rockna Wavedream Signature, or one of the other top-end contenders, but I selected the price range to achieve a sound quality that is consistent with the rest of my system and because I don't want to spend more due to the still evolving nature of digital technology.  I do like the more natural sound (to my ears) of NOS R2R DACs.  So far, I have considered the three below, but none seem to be a slam-dunk upgrade from the Adagio, which still sounds pretty good in my system.  The decision is complicated by having to "buy to try" so that I can hear one in my system.  Maybe now is not the time for an upgrade.  Any thoughts?

  • Denafrips Terminator w/DSP board - Reportedly has the full body/dense tone type of sound I like, but also has a high'ish output impedance 
  • Holo May KTE - Reportedly measures great for an R2R DAC and has strong reviews 
  • Rockna Wavelight - Some reviewers like it but others put it in the middle of the pack for the price
Mojo Audio is another possibility to look at. Models from 5-12k. All using analog devices r2r modules and choke filtered independent power supplies.
I do like the Audio Note Dac3/4, Ear dac ( is great!!) Chord, Metronome C6 (gorgeous !!) 
@wdguru I built my own amps (from Nelson Pass designed boards), and as I've refined them, I've directly seen the impact of moving from stereo to a dual mono design, putting the PS into a separate chassis, replacing copper with solid core silver wire, and using high quality film caps (in my preamp). The fact that the Holo May also incorporates all these features while also using r2r decoding as in my well-loved Audio Mirror and a pure class A amplification stage as in all my other equipment made it very attractive. It is very rare to find that many of my "key" features in a component, regardless of price. I'm hopeful I'll be rewarded with the choice.
Aqua La Voce or La Scala might be up your alley and bracket your budget. They are R2R/FPGA DACs. I have no actual experience with them, but find the implementation and approach intriguing. Some day.