Even if it goes unused, I think the 3G is a nice option to have, if anything for future proofing in case of travel or other needs.
I agree but it is a 'big' chunk of money for something that might not even be used. (lookng at $130 if I want to just to the 32G wifi = 3G model)
We used maybe 2 month on a pre-paid data plan when we bought the ipad but after that, never used it. It is just this 'stupid little part of me' that tells me I should get it for future proof.