Hmmmm, has nothing to do with self control. It has to do with control of the machine. This person is purchasing there first street bike, they don't need a 1000. Everyone posting about outgrowing a 600 either doesn't have a bike or are the same idiots riding busa's into cars and take there corners standing up. Anyone with skill knows a 600 is a machine to be reckoned with and a liter bike is something that only the mature and seasoned few should ever take out onto the street. The point is if you have to ask what size bike you should get from all the idiots on this board then your ass doesn't need a bike to begin with.