The Audi A4 continues to intrude upon territory once held by the highly regarded BMW 3 Series. Though purists will argue the front-drive A4 cannot dance around a track as willingly as the rear-drive 3 Series, potential customers might be pleasantly surprised by the Audi's handling prowess and find other reasons to buy as well. The A4's luxurious interior, optional all-wheel drive stability and sub-$30,000 price tag are front and center in the minds of consumers, and that's exactly the way Audi hopes to keep it.