I am looking for a pair of headphones to put inside my helmet. To fit comfortably, they need to be thin enough to not touch my ear. This means being under an inch thick. Any headphones that meet these criteria and can reach ~105-110dB unamped through an iPod Classic? Sound quality is less...

I have a pair of Shure S4g's that I rma'd, and plan on selling when I receive them back. With the money I get from selling them, plus ~100, what would be a good upgrade?

I've had three sets of E4Gs. I'm using the third set now, and the right ear bud is starting to fail. This is the same problem I had with the previous two pairs. With the first pair, my source was a Zen Sleek. With the second, the Sleek and a Nano. With this third pair, exclusively the Nano...