It depends on your stamina. Let's say you have 150+ Stamina, then the War Fork does the most DPS with no SSI. With 10+ SSI, the leafblade takes over.
I posted a link to an Excel Spreadsheet in the Warrior forum that will help you choose your weapon.
I guess I might as well post the link
here too...
Someone added a web-base calculator in that same post if you want to check it out.