I've been thinking of starting my music collection over after a recent crash. I've been toying with the idea of going to music video's and taking advantage of the iPhone 4's screen. Anyone a regular purchaser of them? What kind of quality and format am I looking at? 1080, 720, 480? What is the audio comparable to? 128, 256, 320? Space issues aside, it might be cool to have the official video's to listen to AND watch...