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The combination of a rich, luxurious interior; a smooth, powerful engine; and truly refined road manners make it hard to top a BMW 7-series when it's time to embark on a road trip, so I was more than happy to sign out the 750i xDrive for my journey to Michigan's west coast for the weekend. Because the occasion was a high-school reunion, I plugged in my iPod and chose a classic rock playlist so that I could aurally transport myself to the late 1970s. Turns out, though, that was the only thing that reminded me of the '70s, because the 7-series is a true twenty-first-century car packed full of state-of-the-art technology. Thirty years ago, it would have been hard to fathom a car like the modern 7-series. Of course, thirty years ago paying $100,000 for luxury BMW sedan would have been hard to fathom, too.

The Grand Cherokee first arrived in 1992, and was originally conceived as the replacement for the Cherokee. But with Cherokee sales still strong -- and the SUV segment starting to take off -- Jeep decided to keep both vehicles. Larger and more comfortable than the Cherokee, and equipped with a driver's-side air bag and antilock brakes, the posh Grand Cherokee was the first serious competitor to the blockbuster Ford Explorer, which had been launched in 1990. The two vehicles really fueled the SUV boom. In only its second year, Grand Cherokee sales surpassed 200,000 units, and would eventually touch 300,000 (in 1999). The profit-gushing Grand Cherokee was also a major engine of Chrysler's rosy financial results in the heady 1990s, helping make the company an attractive takeover target for Jurgen Shremp's Daimler-Benz. More recently, sales have returned to earth, slipping below 100,000 in 2008 for the first time since its launch year. Although still an important vehicle for Jeep the Grand Cherokee is no longer the brand's bestseller, as it now follows in the tire tracks of Jeep's original icon, the Wrangler.