The stock Grado foam pads are somewhat uncomfortable for hours-long use. My local snooty audiophile shop sold me a $10 set of replacement foam pads that are radically more comfortable than the originals. And, I completely agree about the "revealing" nature of Grado headphones. When I first got them and plugged them into my PC, I was shocked that I could hear my mouse moving. Scrolling a window was a cascade of noise. And, heaven forbid you did anything with the hard drive.

I'm now a fan of external USB sound cards...

EDIT: hear my MOUSE, not HOUSE moving.