I have the world wide ceramic wheel bearings. They work great, but the bearings alone won't make a huge difference.
Everyone always hates on me when I say this but super-light wheels and bearings don't make a huge difference; At least in road racing. Now I'm not saying you won't notice them....just that I'd have everything else like suspension and geometry dialed in before I bought some couple hundred dollar bearings. I've had BST's, marchesinis and a set of OZ wheels with worldwide bearings in all of them...no failures.