the only advantage a 4 or 6 puck clutch have is the clamping pressure provided by it. The pressure plate has to push a whole round clutch and with 4 or 6 puck it has only certain surfaces to be pressed against the Flywheel. This in turn provide less surface for the springs to place pressure and henc the pressure is higher then it would be in a normal clutch. Since the contact would be harder, the use of exotic materials is used, Carbon, copper, and other metal composites or alloys.
Choosing a clutch would depend on several things, what you plan to do with it, what kind of power you motor is making, Streetability and other things.
if you like a full drag or race setup there are Twin Plates, Triple plates, which use carbon or composite metarials on the friction surface. But these tend to be heavier duty then the puck based clutches. But if you need it for the street I say stick with OEM.
There are a lot of Manufacturers, but I say Act has one of the worst clutches there are, they do not last long. As I have personal experience with ACT 2600lbs heavy duty clutch which was not any better then the OEM.
I say Go with OS Giken, Exedy or others. I have the OS Giken Twin Plate Carbon Carbon on my Evo running about 550whp. And I use it on the street and the track and has held up for past 3years, and is recently showing signs of wear.
