It really depends on what that $100 means to you, and how and how much you expect to ride. If it's a matter of forgoing dinner for two at the restaurant next Thursday, and you expect to do some serious sport riding it's a decent value. But if you're already near your budget for this bike, then you're probably better off hanging onto the dough. It's really easy to progressively work your way into bigger dollars on a bike, because each added feature seems like small dough in the big picture, but you have to draw a line and spend what your comfortable with.

So it's a simple question of what the $100 is worth to you.