AMG__POWER

Watsup everybody so I bought a 2006 e55 with EC 83mm pulley and EC ecu tune and pump about a month ago and I was considering doing the following mods in a couple months, my budget is to stay under 1500 and eurcharged says they'll do these for that price, PLEASE take into consideration I drive the car once a week and very rarely drive it hard, also will these mods make me slower off the line? I am pushing around 530 right now I would like to be in the 570 range and be done with it, but I want the car to be faster off the line,thanks
I was thinking of doing
EC headers for 750 not the long tubes
EC belt wrap kit
EC heat exchanger
K and N filters
PS I live in CALI so it does get got here