Bit of a late response....
I went for the Sachs SRE organic clutch. Up to 400lb.ft capacity. Car is Revo stage 1.
The first 150miles was extremely stiff on the pedal , and there was the expected shudder when moving off and reversing.
After 200miles the clutch went almost back to OEM weight, a bit heavier but a lot easier to use. Shudder still there but not as bad.
Gear changes on full boost are now really good! It keeps the power on all the way to the red line if you want. You just need to be mindful of what the tyres can cope with!
I'm happy with the clutch upgrade, definitely.