We are down to the final decisions concerning our new (to us) Co Motion Speedster tandem. It is a lightly used 2007 model and currently has Rolf Prima Vigor wheels. Due to cost and durability concerns, the LBS I am dealing with has offered either a new set of Co Motion Speedster stock hubs and rims (DT Swiss 540 hubs & Velocity Dyad rims) or a new set of Cannondale R2 stock hubs and rims (White Industries Mi6 Disc hubs & Sun ME14A rims ). Both are set for front/rear disc brakes, even though our “new” bike only has a rear disc. Does anyone have any opinions on which set to go with? I don't think I can make a bad decision either way, but I am leaning towards the Cannondale parts after doing a bit of on-line research. Thanks.