I'm probably going White/Silver again (I usually alternate every year). But I might go gold, if they make a Gold iPad. I think that would look really good. I don't really like the chrome bits on the gold, but the aluminum bit on the back is nice. And this new one looks like it won't have a chamfered edge, so less shiny gold bits. There will still be a shiny bit on the home button though.
I'll probably go white/silver, because I know I'll like it 10 months from now. Not sure I'll feel the same way about the gold. Plus the new UI I is predominantly white and seems to play better with the white more than the black.
However this is all under the assumption the black color combo will be black/space grey (which I don't dig so much). If it's black/slate, then I would probably get that. It seems the antenna bands on the back blend in better to the black than into the white.