Welcome! I bought the same car a few months ago.
This is the order of what I've done...
1. Clear indicators (front/side/rear)
2. K&N Drop in Filter and debaffled airbox
3. CAI & Front Strut Brace (yet to install)
1. M3 Front & Rear bumpers with side skirts
2. 35% Tint
3. 18" wheels (m-parrallels perhaps)
4. Engine Chip
5. Short Shifter
6. Rogue Engineering Exhaust (but I'm happy with my stock sound for now)
7. Suspension (I'm happy with my slightly lower factory sport suspension)
8. Euro Ellipsoid Headlights with DDE
If you don't understand what some of these things are, just search for the term. You'll find way more info than posting a question and waiting 4 days for ppl to reply!
p.s. Nice choice in car!