Get the 3G. It’s quick, easy, free with Amazon account and available anywhere. They say you can download a book in 1 minute. Don’t believe them. 25 seconds tops.
Thanks everyone for the quick responses. In my case, I would probably download everything while in my home. So if I have Wi-fi available, I would probably get the non-3G model.
How can I determine if I have Wi-Fi connectivity available where I live?