I don't really mind the look of the plastic caps, myself...but if you wanted to make it look really fancy, you could put a black lacquer finish on the wood case, swap the red LEDs for white ones, and then use doubleshots of ivory-effect plastic (like they use for piano keys) with transparent legends for the keycaps.
P.S. Based on the description and the glimpses available in the pictures, can anyone ID the switches? The housings look a little unusual to me, but it could just be because they're not easy to see clearly in the pictures.