Those are nice brakes but the cost is awfully high for my tastes:

http://www.rivbike.com/webalog/brakes/15111.html

These Diacomps cost almost exactly half as much. While they're not nearly the high zoot finish of the Paul stuff they're definitely a workable brake.

And most people don't know just how nice a good set of centerpulls are because they only rode old nasty junk bikes with rusty cables on which the centerpulls were misadjusted.