I'm getting ready to purchase a new bike, and one of my experienced riding buddies suggested I look at a cross bike as a do all "road" bike. My use for a road bike includes recreational and fitness rides, eventually commuting, and perhaps light ("credit card") tourig. My only hesitation is I am very interested in doing very long rides, centuries, doubles, perhaps even longer brevets. With road tires, is a cross bike a good option? There is a definite possibility that i will at some point try cyclocross racing, but for giggles, not with any thought of becoming the next great thing in cross racing.