i have a 2000 gt with 3:73s, Mac cat back, pro 50 shifter, and a k&N filter. looking for my next mod, thinking of a steeda CAI or a throttle body. the car has 62000 miles and i want a supercharger down the road. is it worth it to buy the CAI now or just go with a 75mm throttle body, maybe a plenum or pulleys? or an X-pipe?