I am around the 50 hour mark, and have had some more head time with these babies, and man they continue to impress! All listening has been done with the Liquid Platinum and Gumby. I am getting a feel for this system, for a while and then I am going to try them on the Bottlehead Crack. I am a big fan of the ZMF Ori, and I am really digging how the Aeolus, compliments them. First off, the bass on the Aeolus, almost hits as hard as the Ori, and that is impressive, and I did not think they would hit so hard, being open back, but man what a nice surprise. The imaging is fantastic, and everything is very well balanced, with no distortion. Another thing, that really stands out, is how they fit, my super small head. To put in to perspective, I wear a 6 3/4 hat size, and have always struggled with fitting things on my head. I went with the suede headband and strap, and these headphones fit my head like a glove, and just float on my head. Every time I put these headphones on and start jamming, I can't sit still, and literally start moving to the music, even at 4am this morning! The Aeolus are keepers for sure, and I am already thinking about selling a few headphones, that are going to get neglected.