I settled them for brake in. I'll be doing that for a week. For now Porta Pros are more fun, darker and duller but I can enjoy music. WIth Grados it was like higher range was always getting in the way of my perception, after half an hour my brains were zzinging. If they do not change I'll be selling them and be done with it. Other than for piercing highs and a bit emphasized mids they sound very good, the bass is amazing, but it's not so easy to see it because of terrible higher range that always jumps at you.
EDIT:
After 2 days of braking in I start to enjoy them, they felt more mellow and soft, and these are really really what I would call FUN headhones! Probably not fun in a basy way, but in a analytical way because I find them to be analytical. Today I listened constantly for 2 hours, no fatigue whatsoever and I felt like music is being shown to me in a different way than before with all the other headphones. And one interesting thing I did not have to turn the volume up to be enjoyable, quite amazing headphones. My only gripe now is the comfort, extended periods cause pain to my years, on the outside where the pads press. Other than that i want to say Buy them! Detail has never been more fun. It really has been some sorts of revelation and I do feel Sr60i sound a bit different, but very enjoyable.. did you have situations, when you're listening to music, and get the sensation it sounds sorts of amusing and funny and soooo deeply enjoyable right there? Sr60i do just that with the music.