I am having a hard time deciding which iPad to buy. First issue is Wi-Fi or 3G. I don't really want to buy the 3G version again b/c that function will be out of date when 4G is available. I really would like to tether using my iPhone b/c I will continue to upgrade that... and I have unlimited data on my iPhone but if I tether I lose my unlimited data. If I buy a 3G version I can't decide btwn AT&T and Verizon. I hear that Verizon is slower... is this true? I just don't like AT&T's coverage. Has anyone found a legit workaround to losing the unlimited data while tethering...?