punkrocksailor

Hey all, I have an STi and my car is going to be used for R&D by AVO and I am currently on the stock clutch and will be needing to upgrade. I was thinking about an Excedy twin plate as they claim they are good to 600hp but I've been told by some owners that they only last about 15-20,000 miles. Anybody have some advice for a clutch I could use that would hold around 5-550hp (crank hp) on my STi?
Thanks,
Joel