Looking for opinions. Currently have RS 81 50mm on 2016 Tarmac Expert with 6800 on it. I am not in love with these particular rims. Looking to pick up back-up/primary wheelset and see if triathlete son wants my set. Mainly ride on pretty decent roads, weigh 180 #. Wheelsets available to me: Fulcrum 3's or 5's, Ultegra 6800, or Bontrager RXL (with tubeless tires attached). Last set is new from a riding buddy for $500. Looking for best value v performance opinions. Thanks beforehand for all the opinions that are sure to come my way. All other sets are pretty much priced at current market pricing.