Awesome car dude! And whoever think's its a fart can, think again. The ricer age is slowly fading away. Honestly, if the people driving next to the guy with the fart can are annoyed, do you honestly think the owner of the fart can actually enjoys the sound? There's a difference between the N1 canisters that sound like a choking smoker with lung cancer and the N1 canisters that produce low rumbles. Ever hear WRX's or Evo's? Any good SUS or Titanium exhaust can make even something like a civic sound good. A deep, low rumble is made, not a crappy fart repetition.
Dude, you've gotta add some JDM flavor to that SI! Something along the lines of Work wheels, some Mugen aero parts(though the stock aero already has it's roots through Mugen design), some tint, JDM retrofits. God, even though than engine bay is tight, you can do wonders with that K20 under there.