good pick up there, i think a lot of people are concerned about power to weight ratios and are actually forgetting that it has to pass the capacity test as well! (no more than 3.5L per tonne) as mentioned above. Seriously i would wait, its not worth the hassels.
My bro is in the same situation, i think he has decided to just buy a VT calais supercharged then save up for an SS or HSV whens hes off the P's. Believe me the amount of stuffing around i did to get off a power to weight fine was bullshit, and that was in a VL Turbo, youd have no chance in a Gen 3.
Your also gonna get ripped off by insurance, i dunno bout you but id rather put at least $1500 or so of the $2500 a year you will be paying towards a better car or mods!! For a comparison im 23 and got a VT SS 5.0, i pay $1200 full comp through RACV.