OK. I am breaking in the new GH1 with a varied diet. To begin with... "Dreams of New Orleans" by Wycliffe Gordon and co. Then a disc of Dvorák symphonies. Now the last disc of Solti's Götterdämmerung (Wagner). There is already a little more bass.
The only thing that I don't like is the cable, which is kinked and less sturdy than the one that came with my RS1i/e and PS500.
[Edit] In case I was talking rubbish, I have carefully compared the cables on the Grados listed above and, I must say, they look the same. However, the cables on my older Grados (RS1i/e and PS500) are more sturdy and robust to handle. When I received them, the cables just unfolded happily and without kinks. The GH1 is kinked. Kinky? Gekinket? Does anyone recable Grados?