My 2007 SN Excalibur is ZO DBW. Awesome pull vs PP I had in my previous '99 SN. No fussing with weight, wind, etc.. I could pull that system down quite a bit at 195-205 punds when i was in top shape, so when I jumped behind a ZO tournament boat, it was a big difference. If you just want to ski and not do tournaments, the PP should be a great system for you. If you ski tournaments, go ZO all the way. I have been contemplating upgrading to the single puck ZO system for my training buddy, because he and his daughter ski in tournaments. They both have gotten into 39 this past summer and have no issues behind my boat though... We use his new MC and my old tug boat and he scores the same. Not sure that would be the case if I had PP system..