I am new to iPad, but have I have many movies that I've ripped from my DVDs our purchased through iTunes that are in the correct m4v format. We play them on our Apple TVs at home. But, I'm looking to move away from the DVD player in our car and let the kids watch movies on the iPads. I would like to have them be able to access more than the small amount I can load on the iPads. What is the best option for streaming the movies to iPads while on the road? Obviously, I'll need an external drive, but there's so many options out there and also ones that include wireless network to stream or hubs that connect to drives. Does anyone have any experience and suggestions?