I find it kind of hilarious that ever since owning an original Audio Technica ATH-M50 in High School, I've never found a better headphone for my needs.
I've tried a good 6 or 7 now, all after demoing and spending months on head-fi looking for impressions on each, but I still can't find a headphone that has the comfort, portability, build quality, and sound of the M50's in a single package.
The AKG K545 & K845BT come close, and surpass it in sound & build quality, but they are just not comfortable for hours of continuous use like my M50's...
I'm thinking of getting a new detachable cable version from Sound Professionals again.. This would be my second from them and 3rd overall.
I simply cannot wait for Audio Technica to finally release its entry into the hi-fi mobile market. All the other companies are surpassing them lately, but it seems that AT is the only one for me.