Wheelsets. Wheelsets. Wheelsets.

700c wheels allows me options and benefits that just aren't possible with 650's. I can borrow wheelsets from teammates to test them out, experiment with types/weights, and get great deals with members of the local community. I've experienced tubulars, deep rims, carbon, ultralights, bladed spokes, you name it -- and marvelled at how the different technologies transform how my bikes roll. Speaking for myself, I know I would be sorely disappointed if I didn't have those options. YMMV.