I'm with Josh...... the $$$$$ of buying a more economic car are incredibly hard to justify unless you are driving an astronomical amount of miles and are buying something with the mileage of a jetta diesel. why would you want to drive an inferior vehicle everyday over a few dollars in gasoline??? IMAO..... if you were so worried about gas prices you would have never bought a RR in the first place... my vote..... drive the RR or X5 and save yourself some money in other areas