Received my Utopias today. My rig is the Auralic Aries --> AES Black Dragon --> Yggdrasil --> RCA Blue Dragon --> Valhalla 2 (stock tubes). In the spirit of "stream of consciousness," I will just start typing and see what happens... These live up to the hype. I was worried I would be underwhelmed as some other have been, but these are fantastic headphones. Coming from the HD 800 (stock), I was worried about the smaller soundstage. Yes, the soundstage is definitely smaller than the HD 800, but the instrument separation is much better and the image feels a little more three dimensional. The HD 800's soundstage is very wide, but the Utopia's soundstage sounds maybe a little deeper, and just maybe a little taller? It's definitely a different image, and it is pleasing for different reasons. I never thought I would say the HD 800's soundstage is TOO wide, but after listening to the Utopia I could see how people might say that. The first "negative" I noticed (IMHO) is that I think the vocals could be a little more forward. Maybe the vocals on the HD 800 are overly forward and I am just reorienting myself? They just sound a little laid back to my ears. The details and dynamics are top notch. It didn't take long for me to start noticing little things I have never heard before in songs I have listened to hundreds of times. Where a series of plucks or taps sounded generally the same on the HD 800, I am noticing little differences in guitar strums, strikes to piano keys, whatever ("Oh, that key was struck harder than the last one," etc.). And of course, these seem to have significantly more bass than the HD 800. But it isn't overwhelming; the level seems just about right. Could be me, but the bass sounds maybe a TAD muddled? I feel like the HD 800 has very detailed bass, but it just doesn't hit hard. The Utopia hits harder, but maybe is a bit less detailed? Conclusions so far... with the details, dynamics, 3D image/soundstage and instrument separation, these are amazing headphones. To my ears, they are better than the HD 800, which I love and have listened to almost exclusively for 2+ years, in almost every respect. As many others have commented, these babies have no weakness. They also look and feel like premium headphones (but for the price, I suppose that anything less would be a bit disappointing). I'll check back in as more thoughts develop. By the way, thanks to everyone in this thread for their insight. I carefully read through the whole thing (in addition to just about every review I could find) before finally pulling the trigger on these. Hope my ramblings help someone else trying to decide whether to pick up a pair.