between the 2, i would say go for the black....
black 530 is sleek and fierce....but if already have the budget for it...another 13k is a small percentage of the tag.....bite the bullet...go for it....squeeze the agent for a better price...
although layman opinions always feel that beemers have a worse track record in singapore than the merc....in terms of engine catching fire out of the blue ,m3 reversing into the brick wall of embassy....and so on...
but....530 for me anytime over the e320....
*envy*