Most who are using them are getting the through hardened pins. The reason for using these over lets say the Lunsford titanium pins is that they are hardened steel and do not bend. Removing bent pins can be a real PITA. They hold up much better with little wear, and I have yet to hear about anyone breaking them. There is a thread in here some place about them, along with a link to the site where you can order them.
Here they are.
http://www.plastixs.com/ep03.html