alright so i have the money for a dp and stg 2 or a cai and stg 1. My tuner said he would just charge me the difference when i decide to go stg2 so it would only be another 50 bucks. What should i do first? i am looking at the cobb sf +box or perrin cai. and the invidia divorced catless blah blah. lemme know what would be the best route fools. thanks.