Much has been written about the new Hyundai Genesis and the Pontiac G8, but most reports have concentrated on the eight-cylinder versions. Here we've gathered the sixes, more relevant now than ever, and threw in two competitors that are available exclusively in six-cylinder form, the new Nissan Maxima and the Toyota Avalon. All four are largish cars, priced in the low-$30,000s range (except for the slightly less expensive Pontiac), that promise something more than the typical mid-size sedan. ...next page >>