Since at least the 1980's, Grados have been the open can for rock and electric blues. Their forward, sitting on stage with the band, presentation and sound stage, while great for CCR, are not optimal for classical.
I have not yet heard the 225e, but the 225i was considered by most to be the sweet spot in the Grado line. With its increased bass over the i model, the 60e is one outstanding value.
All Grados are easy to drive.
P.S. be sure to check out some of...