if you're looking primarily for aero advantage, the clip-on disc sections will provide a performance increase over a plain spoked wheel at very little additional cost. this matters more in a TT event because speeds are generally higher than in a track situation. if you want scene points then be prepared for time investment on ebay or elsewhere, and likely a crash course in loctite application, fun with gluing tubulars on the side of the road, and combating crosswinds.