I'm using the iPhone 5S and would like to get a bluetooth one. I've always been a fan of wired earphones because I feel their audio quality is unmatched. Bluetooth earphone users has there been any recent change in the quality of sound delivered to your ears? Is it as good as the wired ones? Wired isn't a problem too but I dont like having the phone on me while running. I usually put the phone on the treadmill console before I start my run. Any feedback would be appreciated. Thanks!