Ronimus

hello hello! ok just purchased a beautiful S4 and it is completely stock! i will be slowly upgrading everything int his car myself.
guess what im asking is whats are some of the best upgrades you all have seen that are cost effective and can be done on at a time over a period of time? i know i want a full K04 turbo kit with fuel kit and manifold but dont have 8k to shell out after purchasing the car so what could i start out with? anyone know a cheaper turbo and fuel kit that's almost as good as the AWE k04 kits? and also guys please if u knopw what NOT to buy plz tell me XD thank you for your time and help!