PS Audio III Cullen Modified or Wavelength Proton

It so funny when you ask a specific question, and get an unrelated answer!
I can't comment on the Proton, but I recently got the Cullen modified Datalink III, and I couldn't be happier, very audible improvement over everything I've tried in the past.

OK, then I will be more specific, I have owned the Cullen modded PS Audio and found that it was not in any way in the same league sonically as the the two units I mentioned above, especially when considering cost.

I have not had the Wavelength in my system, but have heard it and thought it was OK.

The MHDT is one of the few real "Giant Killers" I have every heard, and the Bryston is in many ways the best DAC you can buy at any price.

I had a PS Audio Cullen top-end modded DAC here about 2 years ago and was UNDERWHELMED with its sonics.