Black is a b*tch to keep clean..... that being said, when it is? *Swoon*
If you are looking for a lower maintenance color, I'd say white. I wanted white at first, then I saw the black. Oh well. I'm out there with spot detailer almost every day and a car cover at night/while raining. (I don't have a garage)
I have seen the blue and it looks sharp. I guess it really comes down to what you can live with for the 5, 10, forever years you plan on owning it. At least that's what I think.