You really have to be honest with yourself. Are you going for looks/what's cool, or are you REALLY trying to do professional monitoring? The KNS 8400s are at the top of their class in that price range for monitoring. Not for overall pleasure listening. KRS makes very high quality professional gear, not gear for people who want to enjoy tunes on an iPod. Further, there is a reason most studios use Sonys MDR series.
I wouldn't even consider the AT M50s for monitoring if that's a model you are interested in.
This is a good post, for example the Shures are pretty accurate and neutral but they are quite boring to listen to although I am sure they are excellent for studio monitoring as they have very good detail.
Edited by nicholars - 12/31/12 at 10:24am