I love the Tumbler, Batman's kick-ass vehicle from Batman Begins and Dark Knight. Not only for it's complex lines and aggressive posture, but from it's concept as a converted military prototype. True that a vehicle of such special purpose and limited use would be unlikely to ever make it to prototype form...BUT IT'S SO COOL! This version by Flickr user ZetoVince
captures everything I dig about it, and does so at pretty accurate scale and with excellent technique.