I've really really enjoyed my MP4nation Brainwavz M2, very warm, thick bass, great clarity, extremely well built, and cheap. I've been thinking about picking up a pair of Hippo VB because I enjoy bass a great deal, but having read everything I have, I'm glad I'd have a pair of M2's as alternatives when I want to listen to different venues. Just a suggestion.
The 125 IEM's compared thread on Head-fi helped me out a great deal, check it out if you haven't already.
http://www.head-fi.org/forum/thread/...85-added-12-08