I went with the IPF SC due to similar conditions. I have an RJT and since it's not offered anymore I didn't want to upgrade to an SS. This car is my almost daily driver on a 40 min commute each day and with the SC I'm still getting 23 MPG and the power of a V8. I don't track the car very often an I am very happy with the current performance. I went with IPF because of the quality of the kit and their knowledge of the Bosch ECM.
The only question in my mind now is a possible upgrade to a 2014 vette
but this would mean a cleaning house of the cars I have !
Good luck with your decision, the SS really does offer more future options but the LLT SC does offer benefits too
