I have a XTD stage 3 in the Laser, I have 12K of fairly hard driving on it.
Flawless so far.
I have installed a XTD stage 2 in a stock GSX, no issues that I know of to date.
IMO, I see no need to spend the kind of $$ on the other clutches.
I have also ran a ACT2100 *no issues at all, ACT 2600 *springs popped out of the center hub of the disk.
I have zero knowledge of Exedy of CF.
Again, IMO the $$ for those big name clutches that are out there is crazy.
My $150 clutch is worth it all the way.
Daniel