There are quite a few things I need to know first. I'd like to know if we will get a deal like the AT&T one that means it can be activated and cancelled right on the iPad, and at a good price. If so, I'd consider getting the 32GB 3G model. If the account can't be controlled right on the iPad, then I think I'll go for the 64GB wifi-only model instead.
I definitely want 3G just incase I'm on the move. So I'm either getting 64GB wifi-only and getting a pay as you go mifi device to go with it... or I'll get the 32GB 3G model. It's cheaper to get a Mifi than pay for 3G... but if I can activate and cancel right on the iPad then it makes it more worth the price.