Hey guys, I'm interested in getting an iPad for pdf reading. I'm not at all happy with how Kindle handles said documents. However, I'd like to know how you feel about the iPad as an e-book reader. Do you feel any eye strain after a while? Is it comfortable to hold the iPad for long periods of time? Does everything 'fit' in there or would you rather have an even larger tablet? Any serious difference between the iPads 1 and 2 in this matter? Thanks.