New at this iPad thing. I'd really like to use it for productivity work - Pages/Word and Keynote/PP. I've been reading about it quite a bit and find it quite overwhelming. From YOUR personal experience with the 'file management' apps, which ones are the best? I need to bring documents with me all the time, and would love to leave the laptop behind. I own the Wi-Fi 32GB, and usually do not have access to Wi-Fi during the day. Thks for your help.