I'm looking to buy my first iPad. I definitely want to buy an iPad 3 (vs. iPad 2), but I'm not sure whether I should get wi-fi only or wi-fi plus cellular. I have Verizon for a carrier, and with their new plan, I can add a tablet for only $10 more a month. Plus it would make my iPhone my own mobile hotspot. I only travel a few times a year. My question is: will I regret buying the cheaper, wi-fi only?