I found what appears to be a good deal on road wheelsets from Niagara Cycle (Mavic Open Pro w/ Shimano 105 or Ultegra hubs). Both sets are also available through Amazon, where Niagara is the seller. I'm alarmed by a couple comments for the Ultegra set on Amazon because they say they basically received junk rims. I've never bought anything from Niagara. Are they a reputable dealer? I like the prices I'm seeing, but I don't want to get burned.