One of the signs of a quality bicycle is the lack of random stuff attached all over it: the wheel reflectors and dork disk being the prime culprits. I prefer to use reflective sidewall tires instead, not to mention lights.
That was a timely comment. I picked up a new BMC GF02 Ultegra yesterday. No reflectors nor dork disk. LBS mech that built it up said he just won't put that stuff on a bike of this caliber.