Brian...the Pathos Logos is what got me interested in High End Audio. Back in the early 2000s, I was working in NYC and a buddy of mine had just spent a boat load of money (at least it seemed so to me at the time) on a stereo system and I thought he was crazy. As it happened, that first high-end system for my buddy was a Pathos Logos integrated amp, JM Focal Lab 928Be speakers, a Burmester CD player, an Aesthetix Rhea phono preamp, and a VPI Scoutmaster tt with Lyra Argos cartridge. I forget the cabling but I think it was Synergistic Research. In any case, I was completely bowled over by what I was hearing. Of course this was my firt exposure and introduction to high end and so it holds a very special place in my memory banks. I cannot claim to have had much in the way of critical listening skills back then but I remember the sound being resolved yet smooth, quite dynamic, and textured/rich.
I know the original Pathos Logos was generally quite well received. I know Srajan at 6Moons.com just published a review of the Logos Mk II which recently came out and he was not very enthusiastic about the product to say the least, calling it slow, muddy, lacking in resolution, etc...but he also published a follow up saying that his tastes in recent years have clearly veered away from the tube sound and that he may not have had the right speakers matched to the Logos integrated.
So my suggestion is if you can listen to it locally, I would very much suggest you do so. I remember the MK I version very fondly but it has been years since I have heard it but it is one of the components that compelled me to explore the high end for myself and the rest is history. I know a reviewer (I believe his name is Doug Schroeder) at D'Agogo.com, used the Classic One Mk III integrated bridged in mono configuration (2 of them) as his reference amplification for many years. He is very fond of the Classic One Mk III.
Hope this helps somehow although again if you can listen for yourself, that will be the best way for you to determine whether these amps are your cup of tea or not.