Think the polished looks better with black rings, one thing putting me off the VO cranks is the lack of black chainrings in the 50.4 BCD, I'm quite content to use the Spa cycles (sugino made) td2 cranks for now.
Now I've discovered how simple it is to remove and reapply anodising I think it opens up a lot of possibilities: You could totally make black VO chainrings with a bottle of Oven Pride and £30.
Keeping the chainrings and spider black. Going for a "poor man's White Industries" look.
Although to be fair Rotor is hardly a bargain.