If you are in to a show look, work with the headlights, rims, suspension, perhaps some interior upgrades as well. Just because it's show, doesn't mean you can have great functional use from your upgrades as well.
Rofl... pikachu for free? Now that's a whole new story Yeah... I want to find that site that had a crapload of engine dress up stuff, so I can "the show" going on... I emailed that guy about the rims, he said he has a few people ahead of me, but if they fall through I can get 'em.
if you want to keep your low end torque for daily driving i suggest you pass on the header and the exhaust. ive actually heard of cases of av6's with boltons being slower than stock. but if youre doing it for the sound be my guest.