I found on http://www.bocabearings.com/main1.as...GR.5_BALLS_(EA.) that replacement ceramic ball bearings are incredibly expensive! Almost $4 a ball, and there are 12 on each side of a Bontrager hub. That's $96 a wheel.
I am hoping they come down in price at some point. I see now why only the real weight weenies would want to upgrade to ceramic bearings. They are the only ones that can afford to spend that kind of money on balls.
What is the point of my post? None really, just whining. I can never afford the really cool tech. Grease and metal it'll have to be for the time being.