I was kind of in the same dillema when I was purchasing my Z. I've always been a fan of black sports cars because when done up right, they look sick. But I'm also partial to blue as it's a less common color than black. I had never seen the MR Blue we have avaialable in person to completely judge the color. I'd only seen pictures that made me think it was a kind of Robins Egg light blue which just didn't work for me.
I was debating on which one to order from the factory direct then I found out a black one was coming right to me. So I quickly put a hold on it and locked it down. Looking back, I wish I had been more patient and decided that it was okay to wait for a blue one to come in and get what I wanted with all the options I wanted.
Also, and its up to you how you wanna take it, but taking care of the black and keeping it looking 'black' is a chore.
I enjoy it and thank goodness, cause if not, I'd have a bad day lol It's soooo hard to keep clean haha.