For some reason I can't use the quote function with my laptop, but this post is in response to wje's.
I have the non ''i'' version of the GS1000, and as I have said before, I think that they have THE widest soundstage of any headphones that Grado has ever made. But, they're is a price to pay for that big soundstage, and it's resessed mids, John Grados once said. you can't have a big soundstage and midrange proximity. Regarding their bass extension, I find it adequate, in fact, In my opinion, the only Grados currently produced that have more bass extension, are the PS500, GS1000i and the PS1000. As for treble, it is very extended and can be a little overbearing with some brighter recordings.
In the end, I think that it's always a question of synergy, that's why I always take other peoples opinion with a grain of salt, and I invite them to do the same with mine, they're are simply too many variables, (different hearing, sound systems, recordings, tastes ), to pull any definitive conclusions about headphones or any other components.