Welcome to SAU dude.
Bit of a step up from a commonwhore to a skyline .
IMHO Don't chip the ECU, it'd be easier to buy a Power FC (complete replacement ECU), or just an SAFC.
Also, lower your car dude!! Your rims aren't to my taste, but hey whatever floats your boat. Just lower it! It's riding a little high. Seriously high
Check out the Forced Induction Performance section for threads on how to get a bit more zip out of your line.