I've gone down that path twice now, adding a 650 Interceptor because I was lusting the extra power. It quickly faded away, twice. I am happy with my recently acquired gunmetal grey Classic 500 and Classic 350 ReBorn. If one of those has to leave, and that is a realistic proposition, then I would most likely be the 350. I'm keeping my eye out for the coming Classic 650, which could be the ONE.