Definetely before, Rugburn!! Personally, I prefer 2 feminine hands also, but when you're riding 4 or 500 miles, the bigger, the better! The stock seat on the 12 wasn't too bad, but it had a pronounced forward slope that could become uncomfortable on long trips. The Corbin has a comparatively wide, flat, contoured section to the rear that gradually tapers off to a thinner, slightly rounded section up front. When riding agressively, the front part of the seat provides you with ease of side-to-side movement. When cruising down the highway, the rear part provides a comfortable, level platform.
Unlike every other Kaw I ever owned since the KZ days, the stock seat really wasn't too bad, though a 600 mile day up to Deal's gap and back when the bike was newer left me a little sore. Since then, I guess I've made adjustments and gotten used to the seat, but the Corbin still felt better right away.
Squid, RRonin, about the longest trip I ever took was Austin to Phoenix, about 1165 miles, on the ZX11 with a Corbin seat. It was a long ride, but I didn't suffer at all. The stock seat was good for maybe 3 hours, tops. I hope this tells you a little more about the seats. Back to work!