Today I spent several hours hunting all over Spokane for a front brake. One shop didn't know what a dual pivot caliper was. ಠ_ಠ . Not a single shop had one in stock that wasn't part of an expensive set. Finally found a shop that could 24hr me one from Seattle. Riding brakeless for one day was enough to convince me that I prefer a brake.
Also I have a feeling thirdgenbird worked at one of the shops that lectured me on the phone for 5 minutes that a single pivot would be just good
(All in good fun 3gbird; I'm sure the nicer singles do a great job but for what I can afford a dual is going to be the best bang for my buck)