How would you describe the difference, and does it make for better listening for certain types of music rather than others? Also, what about the rs2i?

At this point I'm just speculating about a future purchase. I probably wouldn't spend more than $600, though; at least, not for the foreseeable future. If I land a good job after grad school I might start really getting into the A-class gear but for now $600 is really a hefty expense for a set...

Sweet, thanks!

I'm in love with my HE 400s (and also with my M50s, but as we say, it's a "different kind of love"). I'm curious, however, about Grados. I don't want to spend on something that doesn't really represent a level of quality in the Grado line comparable with my 400s, though. Gurus, what would be...

Ipad 4 -> cck -> Targus unpowered 4 port USB hub (cheap unpowered Walmart hub) -> e9k with e17 docked and USB charge on = works! Ipad 4 -> cck -> Targus hub -> e17 by itself (USB charge on and off) = no dice Ipad 4 -> cck -> e9k with e17 docked (USB charge on and off) = no dice