I think it'd be ridiculous to over look the Whipple with their gen2 rotors. Am I saying that Whipple is the best? It's the most complete kit and I love mine, but I'd look at S/C's such as Whipple, KB, and Techco. If you are looking for a built block, I'm guessing you have big hp goals. Whipple and KB are the 2 twinscrews that have the most power potential and the most accessories you can buy such as 8-rib kits like the one that Steeda sells. My Whipple runs cool, sounds great, is my DD, running the 10psi FRPP tune, had it on for 15k miles, and love it! If I had it to do all over again though I'd of looked at a TT turbo horsepower kit (turbohorsepower.com). They give great gas mileage just like a T/S when not in boost, look great, sound great, and make amazing power...just not CARB legal from what I've understood. Why get a BAP when you can get a whole new fuel system with the Whipple though? I love the looks and performance of a KB, but I've seen people that run the KB's stop making passes to cool the engine, while Whipple owners with the same boost #'s and same power out still making passes. Saleen isn't really worth it. I know that the guy that has a Saleen is going to say something, but even though the Whipple is more expensive, it's a better deal since it is a more complete kit that is also easier to work on (pulley swaps, etc.) Roush TVS is another GREAT one to look at