Well the Rick Hinder one is about as fancy as you can go, titanium and modular.
I like the Surefire pen over the other pens, it is the only one that is not pointy the Benchmades, Mil-Tacs, and Timberlines all have an evil looking point on them.
Another option is making your own, or have a local knifemaker or machine shop make you one for you to your own specs.