After you get the icebox I would save up 2500 - do the PLM header, 3 inch cat and dual 3 inch exhaust - you will need to add an 02 sensor bung after the collector. Then swap for a 42-45 degree VTC gear, 4piston oil pump and fluid dampener crank pulley - skip the other pulleys, then reflash. You'll have a ton of extra hp and tq and can always add a kraftwerks supercharger on top of that. Make sure they disable rev hang during tuning, it's life changing.
Then make sure you have go tires and competent suspension - unless you are tracking the car, stick with the factory alignment specs - you will already have traction issues.
I would not touch the gearing unless you are absolutely certain - the most popular option comes from a car with way less hp and tq than you will have and is designed for short track use.
The 80/20 rule is a good analogy, never tune for extremes - that's not where you will drive 80% of the time.