Does anyone have any experience using the Nikon Creative Lighting System. If so, what is your opinion of this lighting system? How many flashes did you use, how many SB 600's & SB 800's? I am setting up my studio and considering running with this lighting system. I have seen it work once and it looked great and seemed fairly easy, I've also watched the Nikon video on the CSL and it seemed very impressive. So, what does everyone think. I'm considering going with 2 - SB 800's and 2 SB 600's.