Can't go wrong with a carbon fiber theme....carbon fiber knob, pedals, dash kit, gauge bezel. Or you could a brushed aluminum theme, it's up to you. Try these places out.
www.autoanything.com <--- Dash kits, steering wheel covers
www.woodtrim.com <---pretty much the same thing as the other site
I'm trying to do a carbon fiber theme in my car, so far I have the shift knob and....that's it...lol. After I get a short shifter I'm gonna probably get some pedals, gauge bezel, then eventually the dash kit. I just really like the way carbon fiber looks, but I don't have a bunch of money to drop on all of that stuff right now.