Have a 03 t-56 installed need High HP CLUTCH!

Ok guys I am gonna be needing a clutch that can be able withstand rwhp levels of up to 550. Im not sure which one to go with and everything I ever read turns into a war between SPEC and others. I have read and seen Spec clutchs work amazing but they have there downfalls. If anyone could help I would appreciate it. Thank you!
 
Its a tossup I suppose. EVERY clutch has its bad reviews from people. I looked well into this before I bought mine over on the SVT forums (svtperformance.com) and spec actually had the lowest failure rate from the stories I read.

Mcloud (sp), centerforce, King cobra, spec, ect....they all get bad reviews from some and praised by others.

I for one love my spec STG 3 clutch....works great IMO. No chatter either....well if your really ride the clutch then it will, and durring breakin it would. But that basically went away after around 2000 miles....most of which highway.