Hi!
First of all Grado have been sold but I can provide you with my feedback.
Grado headphones have only lovers and haters among the audiophile community
I am certainly a lover. I find their sound signature perferct for me who love detail, listen mainly to Blues + Classic Rock and I am on the bright side of the sound.
The sound is very forward which makes the listening experience very exciting. Some find the treble a bit fatiguing, I don't.
To be honest, I have not tried them in long listening sessions and I cannot tell if they become a bit tiring for the ears after some time.
The bass is present for my preference but not so noticeable as in Audeze or even Clears.
Also GS1000 are probably the lightest headphone you will ever try at this level.
I would never prevent someone from trying Grado and since I have listened to various models, I would certainly recommend to someone (if he can afford) to try at least GS1000 (and not a cheaper model) to live the full experience.
FYI, I have now for sale Sennheiser HD800 and Focal Elegia (with optional Dekoni Stellia pads) in mint condition and very good price.
HD800 is regarded among the audiophiles one of the most classic headphone model ever made and Elegia is for me a perfect (now budget) choice of closed back headphones (I also love Focals and own various models).
Although I love Grado signature, I must admit that HD800 seems superior to me all in all.
Also for the Elegia I was impressed with how the dekoni pads made their sound imperfections disappear.
I think that with these pads, Elegia have little to be jealus of in comparison to much more expensive closed-back headphones