I tried out several pairs of headhphones including the srh840, senns 598's, grado's, DT880/DT770, and kns8400. The srh840's and srh940's were the best of the lot. But the SRH940's are MUCH better than the 840's: much better fit, and considerably better sounding. Nice separation.
 
I do recommend however, also getting the SRH840's leatherette pads. And Shure should really have 1 pair of leatherette and 1 pair of velour pads shipped with the 940's. What they do now is ship 2 pairs of velour pads (one on the phones one in a compartment in the case. So I ordered separately the 840 leatherette pads (took 2 minutes to put them on) Also, since I did not like how the 940's pads felt on my bald head, I bought a pad cover from amazon, which was a bit trickier to put on but it's more comfortable for me. http://tiny.cc/obyqnw
 
I do look a bit funny in them but I am not wearing them on stage. I would probably get the DJ heaphones from Shure if I was wearing them in a public setting. I spoke with one gigging DJ and he said the Shure DJ headphones were the only ones he had which didn't break after 6 months.

I got the SRH940's on amazon for $240 and the next month Shure upped the prices to $300. weird. But probably still worth it at $300. (And check out the 840 leatherette earpads (also on amazon for $15).
 
rock on.
 
 

This is mostly a "warning" review. These headphones are listed under "over ear" but in fact they are "on ear" headphones. The sound is quite good for the price. The pads that go on the ear are nothing special, consider what you'd pay $3 for from a chinese shop on ebay and those are the pads. If you like "on ear" headphones, consider these plus the alternative pads that are out there (perhaps there Sennheiser's or these are third-parties that also make pads for the Grado's).