For starters, I never used the 3G radio in my iPad 2. Never. In almost a full year of using it I never had a need to activate the 3G radio. Why would I pay $130 for something that I never use?
Like Jason D. O’Grady says, I’m 99,9% of time on a WiFi with my iPad. When I do travel, I usually do it outside the country, where 3G data costs too much for my home subscription to be useful and also I don’t see the point in buying a new data subscription from that country, just for the vacation. So I’m getting the 64GB WiFi-only version, just like the one I already have.