BMW M5

 The M5 is a souped-up 5-series sedan that packs a 560-hp twin-turbo V-8 punch. It comes from a long line of high-performance sedans tuned by BMW’s M division. Larger and heavier than ever, it remains seriously fast and, thanks to sophisticated electronic driving aids, is exceedingly capable on the track. The good news: You can get a manual transmission. The bad news: The automatic is better.