I am on the same search for ultra comfortable closed headphones for work. I currently have the Fostex T50RP but it suffers from comfort issues after about an hour due to the shallowness of the earpads. Also it lacks impactful bass. More often I use the KOSS TBSE DJ1000s. They do fit completely around my ears. At first they were uncomfortable but after repeated bending of the headband they unexpectedly got to the point where I could wear them for several hours with no problem. However, the reason I am upgrading from them is that from my FiiO X3 I have to drop the treble by 3db and boost the bass by 5db to get a balanced sound. Pretty decent sound once that is done.
At home I have the Senn HD650s and I wish I could use them at work because they sound phenomenal out of the FiiO X3 and are super comfortable as well. So the fact that they sound so good is what prompted me to start searching for a similarly great but closed set.
In case it helps, here are the headphones I have currently narrowed my list down to based on the search for comfortable great sound headphones with wide sound stage (for a closed can) and deep impact-full bass without being over done:
Bowers & Wilkins P7 $400 - nothing but good reports out there so far for these from what I have seen for on comfort, sound quality and sound stage.
Shure SRH1540 $500 - see Jude's video review on this website. If there were less expensive I would have already ordered a pair.
Beyer dt770 32 Ohm $200. - seems to be a lot of people that like these, and a lot who condemn them.
NAD Viso HP50 $275. - many good reports on these although conflicting reports on their comfort - a few reviews indicate that they suffer from not having deep enough earpads and so the drive grill rests on some people's ears causing discomfort. (many of the full size closed cans seem to suffer from this and have been eliminated from my list such as the Sony MSR-1R and the Sound Magic HP100s for example).
Vmoda 100 w/XL memory cushions - $300. I need to read a bit more about these, but i thought I saw a post indicating that with the XL pads the bass was toned down to a more reasonable level.
PSB M4U1 - $300. Good reports on sound and comfort but they are sorta big plastic toyish looking things.