I received them yesterday.
(I currently alternate between the Shure SRH840 and Sony SA-5000 while listening at work. Source is a Creative Zen Vision:M and Ray Samuels Mustang Amp)
Only had them on for a few hours, so way to early to post any final judgements.
But I do observe the following:
The packaging is superb, cool carrying case, an extra cable and an extra pair of ear cushions
The comfort is great, but these may not fit people with smaller heads, I am at position 2 (out of 10)
The cables are detachable and look to be very high quality. Cable is not microphonic at all.
Bass response is good for an open air design, much better than the SA-5000 headphones
Midrange, especially vocals is great, very detailed
High end is very accurate, not bright at all
So far, I really like them!