Im having a similar decision choosing the colour for a 197, (Albi or Black) and whilst Im prepared to put in the time to keep them clean I think that black or black gold looks better in soft light and the blues look better in the bright light;
Even when the tyres are done really black, in bright light on a black car, they always look 'off black' still and this ruins it...
I still can't decide though. Black is rewarding when clean though, you can achieve better than average results with just a few hours a week spent on it so Id be very tempted by black- and blue is so common now!