I do like contrasting colors, and I think the white would probably look interesting but... Y'know, it gets dirty.

I think this looks fine. Now if the tires were all black, too...
(Sorry for the poor shot, that's the best spot as our
garage is full of donations right now...
I shoved the housing back down the guides so more of it was hanging out in the back. It definitely looks less sleek than it could. It should probably go around the left side of the stem/ht, shouldn't it?
And good thing you mentioned the seat, I think it needed a good 'post greasing. It's raised a bit.