I don't see a problem. You're probably going from an organic friction material to something non-organic. The SPEC units have stock-like feel to them.
May I ask why you're contemplating this? If you're just adding a blower later it's not necessary. If you're doing the motor later as well the clutch will be right there for you to change at that point in time.
What model spec? P trim? I don't see how the clutch would ruin your tranny...did the tech say the current (spec) clutch is bad?
Is it advisable to put a competition clutch rated a 700-1500 ft lbs of torque on a vehicle rated at 400 ft lbs. Anyone see a problem with this?