Unfortunately, since the hd 580s are discontinued, I doubt I could find them in time. I also am curious to try out the ultrasones after hearing about their holographic soundstage. I am slightly afraid of the bass, but as long as it's tight and true to life. I listen to some older acoustical music that is very bass light, I have an equalizer on my phone and computer, so, if neede, I will tone it down. How is it for classical, unamplified, that mainly focuses on the low woodwinds and brass (I play bass clarinet)? I'll be getting these anyways to try them out and if I don't like them, I can always get rid of them and try other phones. I have a feeling it will be a long strange trip in the realm of the audiophile.