ElChingon said:
Have people really and issues with particular cables
I have. When shimano switched to underbar routing of the shift cables (think Ulegra 6700) for their higher end STI levers, I had problems with imprecise shifting due to cable drag on the rear derailleur. Switching to a lower drag cable housing certainly worked for me. Indeed Shimano wants to use the very latest version of their cable housings because they're supposed to have much less drag.
I used the Yokozunas but the brake housings are a ***** to work with for two reasons. They're mega stiff and they're a bit oversized. Trying to get the cable housing seated in an ultegra 6700 caliper required heroic efforts. I doubt I'll use the Yokozunas again.
I've heard good things about the jaqwire sets.