Based on this thread I decided to order a set of Swiss Stop greens for my Voyageur that I have been unhappy with the braking on. Between that and a cantilever upgrade to Oryx (which I already have) from the old Diacompe, I am expecting great braking performance. If that fails, I will upgrade the cantilevers to the new Shimanos that are supposed to work well.
And the color of the green pads should go better with my bike than the Kool Stop salmons.