Just as you'd suspect, it takes big bucks to buy the biggest sedans in the country, with the extended-wheelbase version of the Rolls-Royce Phantom—a 20-foot leviathan—requiring some $500K as a bare starting point. With that in mind, we’ve narrowed the field to feature cars only from the more popular brands, although most are still pretty pricey. The only two truly mainstream choices are from those bastions of the American full-size Sedan, Chevy and Ford. All, however, stretch over 200 inches, providing significant cabin space and much in the way of high-tech content, as well as room for all kinds of junk in the trunk. It’s also worth noting that these modern-day land yachts can be more fuel-efficient than you may think, thanks to EPA grades that exceed 30 mpg in certain cases.