I went with IPF kit. Because of the maturity of the kit and their ability to tune an LLT due to the Bosch ECU. The kits use a similar SC but the gold nugget is the tune. Without a good tune your car might be a track queen but will not be drive-able for normal stop and go action. DO your homework !
Jesse and Arno at IPF have been great with after the sale service.
1st IPF Supercharged
2011 2LT/RS RJT Convertible