Another very popular headphone for recordists and broadcasters (you seem them on TV announcers at live events all of the time, usually with a boom mic attached) is the Sennheiser HD-25-1 IIs. I own the following headphones/earbuds and my 2 cents on each:
Sony M7506 - very good, mostly neutral sound at less than $100 - not great isolation; I mostly use these at my desk for file review and editing
Sennheiser HD-25-1 II: comparable to the Sony's sound, but perhaps a little less low end. They are smaller and isolate better than the Sony's - I use these primarily for recording
HiFiMan HE500 - open back, huge, heavy, great sound when properly driven - I use them only for music listening in my comfy "music chair"
Westone W30 buds - very good sound, great isolation (~-25 dB), I use in loud situations during recording and general music listening when traveling, especially on planes
ATH-M50 - decent sound, not as neutral as the Sonys and Senns, not very comfortable after the pads start to stiffen. I don't use them any more - my wife likes them when she is walking on the treadmill, however. They isolate somewhere between the 7506 and the Senns
I think the HD-25-1 IIs are the most versatile in my collection from a recording standpoint.