What year bike is it? Newer ones do not have bosses for v-brakes. Still ... $200?? Carbon fork? It would be absolutely irresponsible to "ride the fool" out of that bike without properly paid up life insurance. As for "upgrades"? None. Even a fork swap (plus labor) puts you in the price range of my bike and mine is new. And I wouldn't touch the tires unless you don't mind being smoked by young women on fixies on your favorite road course.