For the last decade, the BMW 5 Series has been the benchmark by which all other sports sedans have been judged. Infiniti has already fielded one serious competitor to the BMW with the G35, and its all-new 2003 Infiniti M45 ($42,300 plus freight and options) strikes again. While its handling is more than impressive, the new M’s real claim to fame is the 4.5-liter V-8 that churns out 340 horsepower. It is fast, and more important, fun. The only real drawback to the vehicle is that it doesn’t have the outstanding lines of the G35. For more automobile info, log on to www.insideautomotive.com.