I second that notion.....but best bang for buck..I dunno. Turbo back exhaust is cool, maybe EMS of some sort, FMIC...how much are you willing to spend is the real question.
Whatever you do though dont buy a boost controller as your first mod! I see alot of newbies do this and then a few weeks later blow there motors. Start off with the basic bolt ons and some type of fuel management then up the boost