What clutch is better for a turbo setup?

[sprinterman52]

Ok so I am planning on putting a turbo in my tutu hopefully sometime this summer. But recently i have had some problems with my clutch not letting me shift.

The problem being that the pedal got very stiff and now I cant shift into a gear unless already moving and then it can slip in. It's like the clutch won't engage at all when I press the pedal down. And if it's in a gear while I'm driving the clutch won't put it in nuetral either. I'm not sure what this could mean either the slave or master cylinder is bad or the throwout is bad or what. So in worst case scenario if I have to replace the clutch I was probably gonna go with the centerforce kind.

Now centerforce has 2 kinds for the tutu, the Centerforce II and the Dual Friction ($50 difference between the 2). Which would you guys recommend and what is better for having a turbo with the extra power in there? I have also heard of Spec but only in the last 2 days... are they any good, and what stage setup would be good since they have like 5 different style stages for their clutches?