A newcomer to the growing compact wagon scene is the Chevrolet HHR.For shoppers searching for a versatile compact wagon that's also stylish, the HHR certainly merits consideration.Current Chevrolet HHRThe Chevrolet HHR is a compact four-door wagon that shares its front-wheel-drive architecture -- and thus many of its driving characteristics -- with the Chevrolet Cobalt. Four trim levels are