If you are that concerned about MPG with an H3, go buy a Prius so you earn the Economic Responsibilities Award from the local tree hugger's group.
Owning a HUMMER for the prestige experience?
Now, if you want a vehicle "like nothing else," than the H3 may be an option for you. Just take into consideration that your local Tree Huggers may not approve becasue you're not driving an oil burning VW bus.