And they're off! ... again. Car and Driver magazine is rolling its annual "10Best Tour Across America" into malls across the nation. The tour stops next in Philadelphia at the Plaza at King of Prussia, May 5-7. Mall hours are: Monday-Friday, 10 a.m. to 9:30 p.m. and Sunday, 11 a.m. to 6 p.m. For eighteen years, Car and Driver has been selecting the 10Best vehicles sold in America. This year 63 nominees were selected from the nearly 300 vehicles offered on the market. They were gathered for an intensive week of objective and subjective testing after which 15 editors rated every vehicle. This year's 10 winners are: the Audi A6 2.7T/A6 4.2, Audi TT, BMW 3-series, BMW 5-series, Chrysler 300M, Ford Focus, Honda Accord, Honda S2000, Porsche Boxster and Lexus GS300/GS400.