I think both series are amazing what people can do with there stock appearing cars. I personally race in the supercar series. The reason being is that Ralph and everyone have treated me quite well. Their events are closer to where I live. Don't get me wrong the 10 second cars are great, but I would never be competitive in FAST. I do not have the finances nor time especially in this economy to build a car like that. For me, my car is street driven 3-5k a year and I like to take it to the track from time to time. Great group, great times and it helps a great cause.