Not necessarily. It's not the material, but the application. In carbon fiber's case, it's all about the way it's woven.. You can lay it in such a way that it's very hard, but also very brittle, or you can lay it in a way where it flexes a lot, but isn't as brittle. The latter is probably more suitable for shock protection, but there's obviously a lot more to it than that. Personally, most of the carbon cases on the market are just marketing fluff. Hamann, being a motorsport company, obviously have more credibility in that area, but I doubt they have the same engineers who make panels for racing cars in charge of simple phone cases.

It's a nice case though. Nicer than a lot of other carbon cases. Problem is you need to be driving a Hamann modified BMW to be able to match the case.
Yes, I have experience.
Saw picture of case. Looked at price. Told them to F*ck Off. Great experience.
Budget?

If you can afford it, it's probably a good idea to get a Bluetooth receiver/adapter thing. A few companies are doing it now. That way, you can plug in whatever headphones you want. Typical bluetooth headphones have crappy DACs (digital to analog converter) inside them, which doesn't really do much for sound quality. Not a completely wireless solution, but better sound and you still won't need to have anything plugged directly into your phone, which is still good for most portable situations, unless you plan of working out or running with them or something.

I have a pre-order for this baby. Planning to pair it with my FitEar customs.
http://nobleaudio.com/en/shop/wireless/
Yes, it's expensive, but I'm sure there are much more affordable options on the market.

Edit: Something like this. Amazon has a lot of cheaper ones as well, I reckon.