I have been digitizing all my DVDs using the Apple TV preset on Handbrake. Tonight I plugged in my 5th Gen iPod and was surprised that the m4v format was not supported. Not on the iPhone either. So that led me to look at the differences between Handbrake's presets for Apple TV and iPod ..... Seems like the big difference is the Audio in AAC+AC3 on ATV and no AC3 on iPod/iPhone .. So, What I'm wondering is, is the +AC3 worth it? What's it really adding? Does anyone have any opinions on Handbrake's ATV preset? The movies I've watched after using it have looked great, but I'm new to this .. Thanks!