Good to know LUK does make some good clutches. Maybe something else is wrong with mine, or maybe it's just a fluke.
I CAN tell you my Turbo Coupe had a SPEC Stage 2 clutch in it, and that thing was amazing. Little stiff at first, but it lightened up to a perfect level after a few thousand miles, and it was buttery-smooth for as long as I owned the car.
I've read (again, no personal experience, just reading) that the SPEC clutches are superior to the Centerforce units. Bill at SCP used to sell Centerforces, but now is all SPEC. I'm sure personal preference has a lot to do with it, but when I finally get around to replacing mine I'm going SPEC.
Finally, I know RAM makes good clutches as well but I haven't heard of them having an application for our cars. All just food for thought.