While enthusiasts may lust for a supermodel, when the time comes to get hitched, when they really pause to consider the care and feeding expenses-not to mention the entry fee-of such exclusivity, the girl next door begins to look pretty darn attractive. After all, hasn't she stuck around, relatively unchanged while you went looking elsewhere for what you thought was the real thing? Still not a believer? Well, chew on this: The Katana 600 has been among the top three best-selling sportbikes from 1990 through 1997. How about more than 40,000 units sold in the U.S. market? The 750 follows the 600 with more than 17,000 units sold since 1990.