Can I justify upgrading from my fairly new (to me; bought it used) first gen wifi iPad to the 3G iPad 2? My reasoning is that many places I frequent, including most of work, does not have free wifi access so I can't use it on the go as much as I'd like to. But I feel bad because the first gen iPad is fairly new to me. Honestly, I probably wouldn't sell it. Thoughts? Current iPad is 32gb but I could probably go with the 16gb since I don't put any music on it and limited video.