Looked through the whole range...
Dead Link Removed
Kindles handle books only, just different features in each. Kindle Fire is more tablet oriented, doing movies, music, books, games, Internet and more. I wouldn't want a Fire... I think iPad do it better in that arena.
I don't want a 3g either... as we got that with the iPad and don't use it. I wouldn't use it with a Kindle either. I would only ever use wi-fi to put my books onto it. As said... already got all that with the iPad, and we don't use it.
What we did instead, is we bought a mobile modem which is smaller than a phone, you charge it and it will last many hours. Allows five devices to connect via wi-fi, and connects at high speed using the Telstra network. It is prepaid, so when we go away we load it up... otherwise it sits in the cupboard. We've tested several ideas if mobile on the go, and that is the most convenient solution we've found to date. We already have bundles on our phones... other devices are just out of control when you start connecting them individually. So we found a better option, one device allowing multiple connections, and smaller than a mobile, yet completely mobile. If near power you can charge it up, otherwise it just runs by itself.
[DLMURL]http://www.telstra.com.au/internet/mobile-broadband-bigpond-liberty-plans/[/DLMURL]
You can buy them prepaid or plans... we use our prepaid, as we have cable at home. They cost about $100 or so to buy, then as long as you top it up once every six months with $10 or more, it keeps it live. Drop in the bucket compared to wasting money per device with 3G connectivity.