I have added the K&N C.A.I. and the Super 40 Flowmaster and I have a Superchip Flashpaq coming today. So I hope to get the torque I need to climb hills and mountains. If not, I may sell this one and buy a Hemi.
That tuner will give you alot of hp and tq, and the max torque gain is around 3,000 rpm if I remember correctly. This ought to be perfect for your application.