If you have 5k to spend I would be looking at upgrading the brakes if you have standard ones,even if you just got DBA rotors and new pads,get edit and custom tune,valve springs and injectors etc..If you want to send me a pm I could take you for a drive in mine as im in Stanhope/parklea area and have done minor things like edit,custom tune,trans cooler,lowered,typhoon cai and centre muffler replaced with hot dogs.It is only a baby compared to some of the beasts on here but may give you some ideas..