Sennheiser PX 200 Professional Headphones

Prior to getting these headphones, I did a lot of research. I looked at earbuds (which I hate from a comfort standpoint), folding in-ear headphones (which I found had no bass), standard foam-cushioned headphones (also, no bass, and felt loose) ... I really was shopping for a set of headphones that would travel well (i.e. folding), have good bass (yea, right), and cancel some external noise so I could use them on a plane, in the gym with lots of other noise, etc etc.

Then I found these. WOW. I'm VERY impressed. They have the same clarity of sound and bass as my regular home headphones, collapse, fit my ears snugly, fit tightly and don't slide off, come with a hard case, and are small enough I don't feel ghetto when I'm at the gym with them.