Just because you can afford a luxury SUV, doesn't mean you should use up all the gas in the world fueling the thing. The 2006 RX 400h (starting at $49,000) is powered by a 3.3 liter V6 engine and a pair of electric-drive motors that offer a combined horsepower of 268 and, more importantly, an EPA city rating of 31 mpg and a highway rating of 27 mpg. Take that, Ford Excursion. The gas/electric hybrid is also still a Lexus, so you can expect extras like adaptive front lighting, rain-sensing wipers, Mark Levinson audio system, standard 18-inch alloy wheels, and an available Lexus voice-activated DVD Navigation System with Bluetooth. And by purchasing a hybrid vehicle, you're eligible for a tax deduction of up to $2,000 on Form 1040. Nice.