Well my pair of gs1000s arrived today. One of my largest complaints with Grados has always been comfort or for me total lack of comfort. I don't think I've ever been able wear Grados before without my ears starting to hurt after an hour. The GS-1000's solve this problem and are the first Grados I've been able to wear for extended periods of time without any discomfort. So for me the comfort is a big plus, I wonder what took them so long but at least they figured it out.
Few observations about their sound so far...
Soundstage is big for Grados I'm not convinced its that big compared to other headphones though. I think what might be giving people that impression is their extremely good instrument seperation and placement. The GS1000 are very resolving headphones, I feel bad for anyone using these with a crappy source and/or amp. If you have any weaknesses in your system they will make it very apparent and then whack you over the head with them. It's still early on, but I think they have some real promise.
Here's a few bad pictures for now, I really need to get a camera that has a real lens, oh and a tripod would help too.