I love my Shure SRH840's, their very comfy and are built to be on the road. SQ wise they have a dark sound, that's not to say that the treble is rolled off or recessed just that the lower mids and upper bass region is extenuated with these cans. overall they have a nice detailed (but not analytical) sound, and block out a reasonable amount of sound.
Direct Sound EX-2, I don't personally own these but I have used the quite a few times and can confidently say that they sound really nice, very flat sounding, more analytical that the Shure SRH 840), very well built and light, with very good levels of isolation.
http://www.musiclab.com.au/product-info/direct-sound-ex-29-extreme-isolation-headphones (I have no affiliation with this website)
FYI price is in Australian dollars.
Edited by jaud - 3/28/12 at 6:41pm