'05 Tuning?
 

I am looking at purchasing a tuner for my '05 4.6, any suggestions as to which model will give me the best bang for the buck? And where to purchase online or store?

We offer the SCT X2. This is a great product.

How much $? How much power would I gain?

You are looking at around $500 for the X2 and it comes with 3 Programs. Expect to pickup around 20rwhp and a lot of drivability, better throttle response, better gas milage, etc

I would say depends where you live, if you are back east then choose whatever you have access to locally. If your nearest tuner tunes with Diablo, get a Predator, if he tunes with SCT get SCT. That way, if you decide to go boosted or sprayed at a later date, dyno tuning is avail. If your out west we tune Diablo. And it has around same gains as SCT at the same price, check around and see who is close to you.

I've heard nothing but good stuff about both SCT or Diablo. Just pick whichever is more convienient for you.