These chips are usually designed to trick your ECU into giving you more fuel which of course equals over fueling.
The best place to start imo woulb be the basics. Things like an exhaust, cold air intake, then move onto big bore throttle bodies, better cams and take things a step at a time. When you have finished with adding power, top it off with a remap to make the best use out of it all.
The other advice I would give is that you will enjoy a car more if it handles better than if it is faster in a straight line. Personally, I would start with suspension and a couple of simple power mods.