I disagree. I'm making roughly 280-300rwhp (estimate) and I have a stg 3 and love it. I originally ordered a stg 2 and was accidently sent a stg 3. I was going to send it back but most people said to keep it because I got a great deal and the fact that I will be set clutch-wise for the future mods. So your saying unless your over 500hp there is absolutely no reason to get the stg 3? How about if you need a clutch now and have plans to make over 500hp in the future? At least by getting the stg 3 you wouldn't have to do a clutch swap again once the stg 2 starts to burn up after 500hp. My friend has a stock 302 with just bolt ons and he went with the stg 3, as I recommended it. He is building a new 347 this winter and has plans for a blower down the road. He says its a good feeling to know he won't be swapping clutches again later on. BTW he loves the stg 3 as well.
I have a another friend with a stg 1 and he loves it, however he wishes he went with the stg 3 after driving my car. He felt little difference when compared to his stg 1 and regrets not getting the stg 3 due to the fact that he might have to buy another clutch down the road once he follows through with his plans to make some serious power. There is little to no difference in pedal pressure between the stg 1, 2, and 3. All feel to grab pretty much the same, just the stg 3 is a little more touchy and chattery during the break in period. I believe the main difference between the stgs is that they are rated for difference hp levels. They are all perfectly streetable. I had some problems at first due to improper clutch adjustment. My clutch was grabbing way too high and fast. I thought about swapping to a CF for better drive ability, but after I installed a Fiore firewall adjuster and adjusted the clutch all has been well. Its the stg 4 and up that will really affect drive ability.