1. I have a greddy kit and like it but any of the above will work. I would just build a kit really you will get the stuff you want.

2. any of the kits can give you up to 300whp from the turbos you get with them pretty easy if you have the motor built to take it.

3. I have a ACT pro-lite and love it. don't buy an aluminium flywheel whatever you do. I had a clutchmasters/fidenza and they tend to come apart. if I had a digi cam I would take pics of what mine looks like. I am lucky it didn't come apart.