Being a car-magazine test driver is one of the ultimate jobs for anyone who likes cars. Test drivers get to spend plenty of time in pricey all-out performance machines -- Corvettes, Vipers, and Porsches -- not to mention awesome less-expensive cars like WRX, Mustang, and Eclipse. In addition, test drivers get to go on great trips to exotic locations, courtesy of automakers eager for publicity. Sounds great? You bet. I