I like the idea of the S2 coming to VM USA but it's true why not get a Nexus 4 and get it on prepaid for the same amount.
What I don't like is T-Mobile only gives ya 5GBs of 4G Data and I like to surf the web and watch YouTube a lot. (No laptop. It died. And to poor to get a new one atm) So I don't think it would be right for me.
None the less I say it's a improvement over the EVO V 4G.