So here are my initial impressions on the GR07s after ~15 hours of burn in time.
Sadly i cant compare them to anything because the best ones i had before are cheapo sennheisers and a betron , and obviously the GR07s are better by miles in every way. The fit and isolation are perfect with the stock foam tips, they work so well that i barely hear people talking to me with music off. The trebles were a bit too aggressive at first , but the foam tips and some burn in tamed them nicely, but wouldn't recommend them to people who are sensitive to that. I really dig the bass though, it is not overwhelming and it is very tight, and accurate IMO. The overall sound is very clear, and i can hear every instrument perfectly. I think this is all i can say since I am a complete newbie.