Just wanted to say that I'm back in the Momentum club . The first time I got it I felt that they were too expensive for my use of it back then (strictly portable), but recently few reasons arose which lead to me re-purchasing them again. 1) I was able to find them for cheaper price than what I got it for last time, 2) I needed a new closed back headphone that isolate very well and 3) Lately my jawline was getting too fatigued due to overusage of around-ear headphones such as SR-007 and LCD-2, and needed something that would relieve the pressure on the jaw (which was the reason why I sold the K550, although I liked its sound very much). I have a minor case of TMJ and 2+hours of around ear headphone use was too much. I figured the Momentums had the sound signature that I like, and was semi on-ear type, so felt that it was perfect for my needs.
And as expected, the pressure from the pad is more on the ears than on the jaw due to their small cups, and even though it's more on-ear they headband is easily bendable to relieve the clamping, so I was able to find the perfect comfort level. Sound wise, obviously they're not perfect compared to my main cans but I never expected them to be. They still have that smooth, relaxing sound signature that I like which is perfect for late night listening, and I can even use them as portable to boot, which makes it very flexible. Very happy that I returned to these.