Then let me be the second. I didn't really enjoy the SR225i for much apart from 80s pop and, oddly enough, small ensemble choral (they had an intimate presentation that was pretty awesome). I found them a bit shouty for rock, and the coloration didn't really work for me. Overall, genre coverage just wasn't broad enough for what was at the time going to be my main headphone, so back they went.
Shame, though. I can't remember having more fun listening to something than when I was jumping around like an absolute nut to the best the 80s had to offer. And I don't really even like the 80s all that much, so those Grados did something magical. I've never heard a midrange quite like that before or since, and the sense of energy and speed was amazing.
These Pioneers had better be damned good if they're going to top that.