A DAC that can make digital sound analog?

You have several fine choices: SW1X, Lab 12, and Metrum among them.

These are the 3 DACs I considered:

- Border Patrol SE DAC
- MHDT Pagoda
- Audio Mirror TUBADOUR III
Decided on the Audio Mirror DAC because it’s built around the AD1865 chip which is the foundation of the Audio Note DACs which are very highly regarded. Search online. I also like it that the manufacture is in the US. The Border Patrol looks interesting but I don’t like the limited input options and to get more than one it’s a switchable input (design compromise?) and bumps the price up considerably. The MHDT looks interesting but doesn’t seem to hit the WOW level with people who have tried them. I was looking for something that frames the music similar to my Rega DAC R which is very musical and works across a broad range of music, hoping for something that builds on the parameters of the Rega. The AD 1865 chip sounded like the best path. I like what I hear so far (1 week) but being patient before I form an opinion, sound wise it’s definitely better, musical differences come as it breaks in and over extended listening through exploring my full CD collection.

I don’t think it’s specifically the R2R that makes things special I believe that is the foundation needed to bring out the best in these older chip designs. Research the chips.
Good luck!

One vote here for the Sparkler Audio model S504 "unison" ― 16 bit Non-Oversampling DAC. It sounds lovely. 

I had a chance to hear the Audio Mirror DAC recently and it was very impressive, especially considering the relatively modest price. The word that seemed apt to several of the listeners was "dynamic".  If I was looking for a new DAC I would definitely give it a more extended audition. Based on that brief first impression, it seemed like a real contender for DAC bargain of the decade.

On the other hand I've been living with a PS Audio Directstream for about a year now, and I am very happy with the sound of that. 

Since I haven't had a turntable in my system for about a decade, I can't really say if either sounds much like vinyl. I can say that neither sounds 'digital' in the negative sense that people seem to have in mind when they ask this sort of question.

...I'm still laughing at the concept of a DAC with tubes...(freediver, 2/7). Forward, into the Past! *L*  Thanks, free.... ;)