Thanks for the long answer! Appreciate it. I was set on the ws99s but then thy went out of stock, then recently the price went to 250. I have the mdr 1rs and I just find the bass a little to mid-bass heavy, and they sound a little congested. I'd like these to perform well with rock/pop/ alternative, and not just hip hop/r&b/techno. Would you mind just putting them in order of which ones you think overall suit a much wider range of music?
If you find the 1R congested then I'd opt for the WS99 or Momentum. You'll get good vocals for rock/pop and alternative. Also, it will sound good with hip hop/r&b and techno. I'd say the WS99's will even be better for all genres. For me, the WS99's do everything well which I can't say for the rest. When most of these headphones go for $200+, I think the WS99 is a good bargain.
I listen to all sorts of music and I have no problems using the M100's either. For me, the L1 and UE6000 are more of a relaxing type of a headphone.