In order to take full advantage of the PCM and to get the best bang for your buck you have two options. The first is a bit less expensive in the short run but not as much power. The second is balls to the wall and a great way to pick up some great HP. Depends on what you want out of the car.
1) Rockers, 1.9 ratio, LS6 springs, steel retainers, OR rods, FW intake, 1 step cooler plugs.
2) Stage 1x cam,, single roller timing chain, new dampner, 105 springs, steel retainers, OR rods, FW Intake, 2 step cooler plugs.
You could substitue CompCam roller lifters for the OR rods, and go with lightweight rods if you wanted to spend the money.