If you were allowed to keep one of them, which one would you keep? I want a new mobile device on the road if I don't want to bring along my MBP. So it's either going to be an iPhone 4S or the iPad 2. What I like about the iPhone 4S is that it fits in your pocket if I'm not carrying a suitcase. What I like about the iPad 2 is able to read pdf's ( but on the other hand, if buy the iPad 2 mainly for reading ,I basically should wait for the iPad 3 with Retina display ).