I had a CAI and Predator just like you. Honestly, I couldn't tell a lot of difference when I added either of those things. Tuning made a bit of difference, but not much.
The main thing that made the difference was my headers. I just put on shorty headers last week and WHOA...the car woke up! I'd imagine that LT Headers would make even MORE of a difference. However, I am VERY happy with the pickup the car received after putting the headers on, it's like night and day. Throttle response is greatly improved and from about 1500-5500 RPM, the engine pulls much harder. So you might want to consider making that your next move. I just wish I'd put the headers on SOONER, I had them sitting here in a box for over a month before I finally got them on.

Coming soon...lower compression and SUPERCHARGER!