So I'd like to start reading books digitally but I can't decide if I should buy an ereader (if I did get one it'd most likely be the new nook color) or just download an app and read books on my iphone. The iphone is much lighter than an ereader and it'd be nice to use the iphone for everything and not have to carry around multiple gadgets, but on the other hand I'm not sure if the screen is big enough for reading comfortably. Can anyone help me decide? And no I don't want an ipad.