I think white would look lovely. Have you looked at this saddle:
http://www.worldcycling.com/merchant...y_Code=Saddles
I believe it is 160 mm wide.
Fizik Vitesse is 155mm, but the white version has some pink on it...
The new Bontrager saddle comes in widths and white. I looked at a few the other day at LBS (the men's racing saddle, I forget what it's called), and I think it looks pretty comfortable (surprisingly, since I'm not usually a huge fan of Bonty saddles)...