I got the wifi. Just this morning validated my choice. I had bought a book yesterday. Was about to run out of the house and hadn't put it on my Kindle, so I quickly sent it over. When I opened the book it looked hideous. I couldn't read it. It was left aligned, and of course, didn't have my font.
So being that I always edit my books before loading them to the kindle, no use for me to have 3g ever. It would be different if it was a Kindle Fire. I'd love to have the HDX with AT&T. But WAY out of my price range.