I can only speak for the Holo as I listened to it at the L A Audio Show. It was in the headphone lobby area and was fronted by the outstanding Headamp GS-K Mk ll. I listened through the Hifiman HE1000 V2, Audeze LCD-4 and Focal Utopia headphones (The Hifiman won ears down) so from source to headphone everything was top notch, to say the least.
All the while I listened (about 30 minutes) the Holo output stayed steady at 44.1 and it was there and then that I decided I could easily live with a high end headphone set up, if space were a consideration or if I had more disposable income. It was easily the best sound at the show and I'm convinced that the Holo was largely responsible for the purity and quality of the sound. Nothing was amiss.
Thanks to that experience and this thread, I'm considering getting the Holo and keeping my Marantz SACD player to use as a transport. This is really a tough decision as I don't need to go down that rabbit hole again.
All the best,
Nonoise