TOMRR, The type of set up you need depends on the application. Bigger is not always better. Disc material has came along ways from the old stock rag type which works well in stock applications. Kevlar / rag combination give better performance for some spirited driving. Kevlar/Kevlar disc has the grip that is some times hard to control chatter but will grab and last forever without wearing your pressure plate or flywheel surface. Then there's ceramic. It will hold the most torque but will wear the flywheel out like a grinder. Now multi disc set ups are another topic for people with more money than I have. I get my clutch stuff from AMERICAN POWERTRAIN. They can build you anything you want.