Tube DAC with i2s input?

One update: SW1X has replied to me that they will consider customizing a DAC with i2s input configured to my DDC. This may be the winner, stay tuned. I did rule them out initially as being too expensive but they do have a range so this may work out, thanks for the tip Audiogon community! 

Otherwise, since I am mostly happy with the sound of my DDC + Pontus II, I may just throw in the towel on the tube DAC direction and go for a Terminator 15th. From what I've read, and my experience with my Pontus I'll bet I'd be reasonably happy with it. 

Price point of dac may or may not be a consideration as to whether adding ddc is optimal. Adding ddc and it's external clocking needs to be considered on a case by case basis, one can't just assume superior interfaces based solely on price. With ddc via I2S we are directly comparing dac's internal master clock and power supply  to the ddc clock and power supply. Far too many just assume usb is the premiere interface without justification, usb interface leaves much to be desired, ever notice the amount of tweaks, optimizations being offered for this interface. In essence all ddc via I2S is offering is an exchange of master clocks, simple evaluation to determine if one is better than the other.

Agree with @sns , which is why I'd like to keep my options open and have an i2s interface on my DAC. 

This guy builds nice DACs , here are some myths according to Ben of Mojo Audio 

https://www.mojo-audio.com/blog/7-myths-of-digital-audio-dispelled/

He does not subscribe to i2s  being the end all be all of digital transfer .   

I don't believe you will need that reclocker if you purchase any of the SW1X DAC models.  Way back (6 years ago or so), I had a DDC connected via i2s to a Pontus.  The reclocker made a signficant improvement.  I upgraded to the Lampizator Atlantic TRP3 and it did not need or benefit from the DDC, so I sold it.  I don't think you would need it if you upgraded to a SW1X DAC--even their entry model.  It is built so that it needs no additional support or enhancements.  I have the SW1X VDT II streamer now, instead of the Innuos Zenith I used with previous DACs.  I have the SW1X streamer and DAC connected via S/PDIF interconnects--strongly recommended by SW1X. The music is seamless, with nuances, detail, and overall "analog" tone needing no additional gizmos.  I think the S/PDIF does a top quality job... and the SW1X units are optimized for it.