The MOST important thing in headphones is COMFORT. If they are uncomfortable does not matter what they sound like.
I own the senn hd 650, AKG K702 and Beyer HT 880 pro.
they sound great and are very comfortable. You forget you have them on.
For portable use, I also own, and highly recommend, the Koss Sportapro and senn px100.
I also own the Grado sr60. I didn't like them. Not very comfortable. They are the entry model for Grado. They currently reside in the closet. Maybe one half hour of use.