Well, whatcha know...my chrome knobs came in today, too!
So, here it is with the chrome knobs:
Frankly, I'm a little torn between the black speed knobs and the chrome knobs. The speed knobs give it a more raw look, but the chrome knobs kind of make me think of a muscle car with chrome trim and accessories. It's got a tough look all its own, in a studded leather sort of way.
Either one will work and will be consistent with a rock/metal look. In a way, though, I am leaning toward the chrome knobs because they just "pop" more.
If I stick with the knurled chrome knobs, I'll also replace the switch tip with a metal switch tip to keep a consistent look.