US versions are pretty rare in the uk, but theres only 6 RC51's ive seen on the Isle of Wight where i live, one of them is a US import (the black red and silver one, is it a Hayden rep?) and its way WAY better than mine
(HRC complete racer ti exhaust, marchesini's, ohlins forks e.t.c) flash git parked next to my shabby looking machine at the bike meet too! only face saving i could manage was mine was quite a bit louder!
Though in fairness, the only bikes that had the same paintjob mine had before it went under a Chrysler were the actual Harris honda Race bikes, and 1 other replica (built by harris aswell i think) though that may have been because it was a rubbish paintjob! lol!
I'll work on the playboy rep a bit more, i think some dayglow yellow like Rdp's bike might liven it up a little.