I'm looking at getting a new pair of headphones when (hopefully) I get my new iPhone 4. I've pretty much narrowed it down to the S4i and the X10i, as both have microphones as well as being what I imagine are good quality headphones. The S4i's are my favourite at the moment (purely due to price) but I've read stories of people finding the mic placement to be poor. As I will be using the phone for work, this is quite an important point for me. The review on here doesn't even mention the microphone, does anyone have any experience of either of these headphones?