I'm going to replace the control knobs on my Strat because they've yellowed a bit and don't match my CS Texas Special pickup covers, which are bright white. But when I went looking for knobs at StewMac, I started thinking about going with black knobs and changing the p'up covers to black, too. I did a "mockup" image. It's posted below with a photo of the guitar as it is currently:

Tell me which you prefer--the current black & white scheme or the black-on-black combo: