Tube DAC Recommendations


I am in the market for DAC; my preference is a tube DAC. My primary music source will come from a computer or music server. The DAC will connect to Sim Audio 700i integrated amp. Budget is up to $7000 for the DAC.
I have been studying this forum over the last several months but cannot seem to find a consensus on the top 3-5 tube DACs.
Any input is appreciated.

Thanks
ddelisle911
I doubt you will find a 'consensus' here, either. I have a new Aesthetix Romulus CDP, which is quite impressive. The DAC-only version is the Pandora. Mine is still breaking in fully, but the sonics are very nice. Superb tonality of instruments, excellent imaging, and very pleasing to listen to. Also top build quality from Aesthetix.
To all-
Thank you for your responses; I welcome more. In the meantime, I will start my research on the above that were already mentioned, I now have a starting point and this helps a lot.
here is another opinion:

first, i have been attending ces exhibitions for fifteen years. i have also attended many shows in nyc. from those listening experiences, i would try to find the original zanden dac, not the current version.
You may want to consider the Concert Fidelity DAC.A used model is well within your stated price range.It`s exceptionally natural with wonderful tonality.
Regards,