Hah, I hate to be a downer on all the completely valid comments and opinions so far so please only take mine with a grain of salt.

When I look at your bike as it is now, I think wow that's a sweet B/W build with subtle hints of grey/sliver in there. I rarely think this but in a few cases I find grey/silver to be an awesome "accent color"; that's how I feel with your bike. If it were me, I'd stick with black or dark grey hubs. I'd also try to seek out some dark grey/silver cable ends and black bar end plugs.

Edit: Actually on closer inspection I see that the end plugs are already black. Nice. I'm loving the dark grey bar tape though.