While the Honda Accord-versus-Toyota Camry debate hasn't sparked nearly as many family feuds or bar-room brawls as Ford vs. Chevy, Coke vs. Pepsi or Mac vs. PC, it is nevertheless one of consumerism's biggest rivalries. Their continuous run as the two of the best-selling cars in America extends back to the second millennium, and they combine to account for roughly 40 percent of sales in a segment that numbers about 20 nameplates. As American, Korean and other Japanese manufacturers continue to roll out worthier and worthier competitors, however, choosing the right midsize sedan is no longer as straightforward as flipping a coin