SO I just got back from Bay Bloor Radio in Toronto, they have a wall of headphones including HD650, HD700, Beats, Denons, and pretty broad line of Grados.
I auditioned all the Grados last, in ascending order. They didn't have the entire Grado line, but the Prestige Series caught my attention very quickly. Upon first impression, I noticed all the Grados are amazing. Even the $70 ones were comparable to the $400 Denons, and easily beat out the Beats in sq, all over the place.
The 325is caught my attention especially though. They had my perfect preferred signature.
Definitely looking forward to grabbing a pair sometime in the near future.