Hello folks! I would like to ask you which iPad is the most efficient to use for ebooks (pdf engineering books). I've been fighting technology for the past 4 years of my career and finally realized that the weight of an iPad will never compare with that of a backpack full of Engineering books, so I am ready to give it a try! If you have experience with this, I will appreciate your input. I've never used an iPad, nor owned any Apple products. Please base your response with the following (since one device may have features the other does not): Not for gaming, movies, music, facebook; Yes to email; Strictly for reading, A LOT of reading and possible note-taking. I have also considered using it to replace my paper and pen, would it work? This gets me excited. Since I know I will be investing on a fine product, I do not mind the price difference btw the iPad vs the mini, I am simply looking for what works best for the task. Thanks in advance!