So I'm new to head-fi after lurking around the forums many times. I'm a student and looking for a new IEM, I currently use Shure SE215s which a bought about a year or so ago and I'm just looking for something with a different sound signature(grown tired of the same sound ). So from what I've done a bit of research, and I like the impressions I'm getting from many reviews on all three of the IEMs listed above, Wooduo 2, R-50 and the B2. What I'm mostly keen on is the more analytical or less 'warm' sounding characteristics on the two BAs, but I've read that the Wooduo 2 is also close to the same clarity, separation and a very large sound stage, whilst maintaining rather controlled and powerful bass.
So I'd just like to ask for some advice on which I should choose, given that my listen preferences are mostly JRock, with the occasional dubstep, rnb, and house. For a reference point on the bass, with some small adjustments to the EQ on my player (Nexus S, Voodoo, Poweramp, Cyanogen mod | no amp because I'd like to keep it all in one pocket) the bass on my Shures is more or less adequate. And as the Shures are around the ear, I've grown quite fond of their ability to stay in my ears as I run and such, so if possible a pair that doesn't have a tendency to slip easily.
So to sum it all up:
1. Different sound signature from SE215 (less warm/more analytical)
2. Good to excellent separation
3. Decent soundstage
4. Relatively balanced, not too fussed as long as most frequencies are presented clearly and forward enough to be able to hear them without much effort
5. Around the same price range (~$120-$150)
6. Stays in
7. Durable as long as I don't treat them like trash (probably won't be purchasing another pair for a while)
Any other suggestions would be appreciated, thanks!
Also, I'm going to be visiting Japan for a short period, so please suggest any IEMs that are exclusively sold in or easy to find in Japan and fit the criteria. (I can probably spend more than the budget listed above, sacrificing other purchases )