I just picked up a pair of D7100's. I seriously love these headphones so far. I also have a pair of Grado PS1000's with a black dragon moon audio cable, and I prefer the D7100's for my musical selections. I listen to Metal, Hip Hop, and Rock in that order, so the PS1000's were the wrong headphone for me. I've rolled the tubes in my WA6SE and settled on my Sofia and 6DF7 and the music is great. Great thick, smooth bass, nice mids and highs. The PS1000's were just to forward and almost hurt my ears for the my music genre preference. I use an all vinyl and tube preamp setup for this. No EQ options are available, as of right now I'm soooooooo happy about these headphones.
So many negative responses to these headphones, but I really could careless, I'm loving these headphones to death.