Headfi's got a leg up on the English-speaking world with a couple of concise reviews of Astrotec's hybrid dynamic/balanced armature AX60 earphone. Ω is preparing one, too, but don't expect it before next week.
UPDATE: Ω's review of the Astrotec AX-60 is out.
Curse you, Astrotec. Curse you for making this product. I am a self-admitted basshead, and these things are an absolute dream. I have loved the Westone 3 for years now, and in the bass department, the AX60 dynamic driver dances rings around the W3. It's not just the sheer visceral impact that you notice, it's the deep-reaching sub-bass that people so often mistake for “bass decay”. It's great to hear it in an IEM. My tests indicate that the volume of the mid-bass is only slightly higher than the sub-bass. To me, that is INCREDIBLE. How is this even possible in an IEM? I found myself reaching time and time again for my “guilty pleasure” bass-heavy music, and just letting it wash through my skull.
The consensus seems to be that these are a "great value for someone looking for an IEM with awesome bass". Generally I don't buy earphones I review, but I have been impressed enough by the AX60 that I bought them. If you're keen on them, check out Noisy Motel.