I agree with matthew.
Acrylic stands are nice because they are almost invisible against your pens. Wood tends to make everything blend.
These may be a little out of the OP's league, and I don't want to hijack this thread, but these are the displays I use:
http://www.classicnib.com/the-classic-pen-displays.html I stand with these 100%, and they are well worth every penny of investment. They work wonders at higher-end shows, and busy places where you don't want customers just picking things up.