clutch questions on a 2005 GT

[sonic blue roush]

who has one or the other? and how do you like it. my fear is i dont want a spec type clutch that you cant slip and vibrates the whole car. i would like to keep driveability and feel close but am gonna be around 600 rwhp and want something that will work proper also. any advice is welcome.
thanks in advance choices are the centerforce dual friction or centerforce dfx