I'm not a good source of information, as the solid state amps I heard at RMAF were fatiguing from the moment I put the headphones on. For tubes, I would go with OTL or SET headphone amps. The Stratus is detailed, well.balanced and refined.
To be honest, I'm looking for an amp to settle with. I have a very nice spot picked out for the Stratus. It's in a corner, well protected by my chaise lounge right next to my pc setup.. It will be blocked in so child and pet proof. I have a 1/4 inch steel plate stand I'm prepping to paint so I'm quite sure it's all going to be copasetic together. At least for me that is.
Ah, I see. It will be an interesting DAC to hear for sure. What I am not entirely sure of, however, will it be the right DAC for you/me/whoever. What I mean the few that heard it all love it and sing it's praise but many of them were involved in the tuning of they DAC... In a sense, it was sort of made for the few that have V.0.99 of it - of course they love it. My listening preferences may be different than theirs so I may not love it.
In the "big stereo" world there isn't a definitive "best" amp or DAC, there are just a bunch of really good ones that appeal to different people. In the headphone world, what is better the HD800's, LCD3 or 009's? All good options appealing to different musical preferences. I just find it hard to believe that the Yggy will be "the best DAC, period".
I'm sure it will be a top shelf unit, don't get me wrong, it is just that without hearing it, how would would one know if they like it?