Send a PM over to TheTunerGuy. Overheard him talking about a bug in the ProCal tune at the last cruise. He's really good at tuning and can tell you what's best.
First mod I did on mine was get the Ford Racing Power Upgrade Package with the procal tuner. It was the only mod and tune that my dealer said would not void the warranty. I liked what it did for the car. Got it from 12.87 down to about 12.50.
As has been the case my whole life though, the satisfaction didn't last. On to bigger and better mods.