Thanks for your help, I'm considering the Havi still, because I'm just afraid of damaging the RE-400; I'd take it on a bus and walk around with it very frequently.
Just asked this on the Havi thread, but I'll post it here to see more opinions:
Need good help here, fast. I'll be ordering an IEM tomorrow, either the RE-400 or the B3. Problem is, I'm a student and someone will be ordering them for me during the day, and I'll be sending them the email with the link to what I want tonight. I listen to mainly rock, metal, and rap, with some jazz, classical, and film score stuff mixed in and loved the RS 180 (basically a wireless HD598) with Led Zeppelin's Kashmir. I don't want my music (mainly guitars and vocals) to sound distant though. I also only have an iPod Touch for a music player at the moment, but will be getting the FiiO X1; the problem is, that might be a few months away. I like a neutral signature where electric guitars and vocals sound clear and well pronounced without sacrificing drums. I'm a drummer so I still want to hear the drums clearly but they should never overpower anything else unless meant to. Build quality is the only thing stopping me from going for the RE-400 right away.
Edit: I may be able to get an NX1 with the Havi, as long as it's right at or under $100, but I can't get a LOD for the iPod I don't think.