I am glad to find someone in this thread in the same work/ business attire situation as mine. White ceramic looks nice for casual/ sporty events. Grey ceramic is fitter for business.
I have the same thoughts, and can only buy one (as much as I would like both). But the white just looks so good. And I can't see the grey before it goes up for sale (was at Apple Store today and no displays of the colour). I'll probably flip a coin tomorrow night and order one or the other of them. I'm definitely getting one ceramic after I didn't want the week-long wait and didn't get the Ceramic in Series 2.