Concerning the date wheel colour, here is a quote from another forum from JC Biver, the father of the hublot big bang (dated aug. 18, 2006)
"Well, well gentlemen, I think I might have to disappoint you.
Some nine months ago we decided to introduce from May 2007 on(if I remember well)the black date together with the black dials. The idea was certainly good and I can see from the reaction that some of you welcome this change.
But considering the stock problems and logistic problems we are facing with two date colours, we decided yesterday to come back to only one date colour, except for certain special models like All Black for instance.
Now, with all your reactions, I am tempted to reconsider our decision?
Will let you know."
So apparantly, the date wheel color will not affect the accuracy. Both colors are fine (though I must say I would prefer the black one, it looks nices on both the cf dial as well as on the plain black dial of the ss bezel version)
@Admin: Very true, on some pics of the gen dial that are taken from a lower angle one can even see parts of the next (previous) date on the datewheel, so the one on the sample from Angus look authentic.
@angus: if there are plans to make the black magic version, it should also be possible to make the ceramic bezel version since the black magic version has everything ceramic (bezel and case).