Mr Duke
I am in the process of upping my power at the moment and its proving to be pretty pricey since i have decided to do so.
I have even changed my original plans of upping my 3dr's stage 3 power and sticking all the goodies on a track orintated saph (3drs to clean/original..bufty in other words).
i would recommend finding someone with a well set up stage 3 car to give you a spin and see the diffrence from your stage one. You may be surprised.
If that doesnt float your boat just go mental and spend a fortune its great fun
cant wait till i get home