Well, I had the S4, and they broke after a couple of months, even though it's probably an anomaly. Joker recommends the Brainwavz M2 (ViSang R03) over the Klispch S4; it's supposed to be better built and have better SQ with the same type of bass driven signature. This was a few years ago, though, so better options might've popped up.
If you can get the X10 for that price, good for you. They're much better than the S4 while retaining the same comfortable tips; it's an all around performer that's invariably more dynamic than the very analytical HF5. IMO, the only Ety really worth getting is the ER4P/S/B, but that's me. For your genres, Etys won't really work at all... their bass is minimal.
If I may suggest a dark horse candidate, try the FutureSonics Atrio M5 w/MG7; it has some of the best bass I''ve heard from a dynamic driver, while still being clear in the other ranges. It's not the best looking IEM though, but seems quite durable. Most online prices have it near the price of the X10. IMO, the X10 probably won't give you the impact you want in the bass.
I can say that I'm not a basshead at all, and I was very pleased with the Atrios. The sub-bass was just sublime. It has a U-shaped response, which is not my type of sound at all, but overall, I was very impressed.
Reviews here:
http://www.head-fi.org/t/554068/review-future-sonics-atrio-m5-with-mg7-transducer
http://www.head-fi.org/t/586322/review-future-sonics-atrio-mg7
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look pretty nice! i guess if i camp on Amazon i can get um for under $100 (preferably the black version). how are the klipsch x10? I seen um on Amazon right now for$140. should i snatch um up?