I could say it would be easy, because 4G is not official in LA. Well, it's supposed to come out on Dec. 1st.
I have used 4G and it is fast. But is it worth $120 for me? No. It sucks battery life and most of what I do is fine on 3G. If it improved battery life, I would change my mind, but that "drain" is just that...a real drain.
Lastly, I think 4G, when it is rolled out, will be spotty. So, the data will be switching from 4G to 3G while on the move. This is a real battery drain, and it causes too many interruptions while streaming radio, podcasts, etc.