Look at the MazdaSpeed 6. It was only produced in 2006 and 2007, and only about 5000 produced each year. All wheel drive, amazing suspension, turbo-charged 2.3L 4 cylinder engine producing 272bhp stock. I picked one up for about $11,000, and have been doing upgrades galore to it, and it recently dynoed out at 314bhp at the wheels (this is much different than manufacturers hp ratings that are quoted "at the crank" or "at the flywheel"...the drivetrain loses a fair amount of horsepower before it gets "to the wheels"). It's a great car. You get the "sleeper" looks of an almost stock Mazda 6 (but much different than a stock Mazda 6, the Speed 6 is assembled in Japan, whereas the regular 6 is assembled in the US), but you can completely toast Mustang GT's, Camaros, Charger R/T's, RX-8's, etc. Plus, when you drive it and keep it out of turbo, you can get around 30mpg as well!