iPad - 64GB, WI-FI & 3G. Extra £10 a month I couldn't really afford.
iPad 2 - 32GB, WI-FI. Useless (for me), Just a giant iPod touch
'The New' iPad - 32GB, WI-FI. I have recently upgraded my iPhone sim-only contract with Three, here in the UK. I pay £25 a month for all you can eat data, 2000 minutes, 5000 texts. Tethering speeds are immense and included with no extra monthly charge. Can only be quicker on this iPad, I hope. I was previously on Tesco mobile for £21 a month 1GB of data, 500 mins, 1000 texts. - With no option to be able to tether the internet unless jailbroken I think..
I just like the idea of being able to place my iPhone on window sills etc. when in environments where 3g signal is an issue, and being able to sit across the room and get brilliant reception rather than relying on the iPad's antenna fixed in one place. If that makes sense.