Yeah, I'd go with the three, which even then is a little over kill, if your car is pretty much stock, then a stage four is totally un-necesary. For that matter, I ran a stage one, and it was an FX100 organic, on a car that made almost 210 to the wheels, and it gripped fine for as long as I had it. But, a four puck, especially if your tracking it, won't do you all that much good, you don't want to have to ride your clutch between gears on a road race car so your car isn't jerky between shifts. I think you'll find it amazingly difficult to heal/toe on a stage 4 clutch. Any way you look at it, I'd say the four is just more than you need.

Later,
Aj