The Cadillac Escalade, a few years ago, became quite the polarizing vehicle. At one end were those who wanted to be seen in something bold and blingy; and at the other end were those who saw it as a sort of anti-green symbol.
But that latter group might have thought differently about it if they knew about the 2013 Cadillac Escalade Hybrid; it gets an EPA-rated 20 mpg city, 23 highway--better than many much smaller vehicles. The down side is that you get very little overt badging to tell others that you're in the less-thirsty version.
And beware, the rest of the Escalade is chronically parched; it gets eyebrow-raising EPA ratings of just 13 or 14 mpg city and 18 mpg on the highway; in our own real-world drives in previous model years, we haven't been able to do any better than that.