In the interest of me not going blind on looking at 45 headphones again, do you have any recommendations on closed-back headphones that might fit the use necessary?  I am considering the M50X, but it appears to be made fairly inexpensively, and I don't know how well it would hold up.

My definition of portable must be different from the generally accepted one.  By portable I meant that I could put them in a case and they would be okay in my backpack, not that they must fold.  My entire adult life until now has been spent moving every 2-3 years with my job, so I just used...

I apologize for how this may sound, but please bear with me as I'll make it short and sweet.   I have a tendency to over research things, and have done that this time.  I want a decent pair of headphones, but have researched for an hour or so a day for the past month (sometimes up to 3-4 at a...