I have a 5th generation nano and I'm considering the latest 6th generation nano with touch screen. Can anyone that uses it for running/exercising let me know how easy it is to control with the touch screen, say, if you keep it in your pocket. Can you easily change the volume and go to the next or previous track without looking at it? How do you access playlists? Are there a lot of taps involved? For those that have used both, is the 5th generation better for running and exercising or the latest touch nano?