If you have to choose one, go with the Black. I believe Ian G. has the best line. I do really like the Satins that Tracy produced last year -- different -- but really nice!.
I'm going for a second cousin to the Black Platinum. I am covering two Cinny's and one Black Pastel with my Butter. My Butter is very yellow and light, so I am hoping for red rather than brown for contrast color as a back-drop for any pattern that will show up. Pattern and color should be somewhat different considering I am using two different animals than Brian used. Congrats to Brian!! Black Platty is SWEET!
Many of my projects this year(thinking long term) involve animals with opposite super forms. Black/White -- makes codom combos done the road interesting I think. Good luck with your search.