Help on clutch replacement

Hi everyone,
I have a 2003 400 EX. I have had it for 8 months. I have done alot of work to it because it was in sad shape when i purchased it. The problem I'm having is that the clutch is slipping. I am at my final adjustments on the cable. I mainly trail ride in the woods. I need a little advice on what clutch to purchase to replace my stock clutch because the reviews that people post are confusing. You seem like you are all very knowledgable with all the posts I have been reading here since I purchased my quad.