Need advice on mod plans

Just purchased 2002 Saab 9-3 SE

Some plans to upgrade this but the only car i ever did any performance upgrades on was a ****ty 1997 civic si back in highschool.

Just put a new catback exhaust on today.

Here is my plan, please let me know if i should invest in anything else, and also if anyone has an aprox. estimation of price of labor for all of this, it would be greatly appreciated.

- Rear Anti-Roll bar - $100
- Steering Rack Brace& Clamp kit $210
- Open Air Intake - $130
- Sport Filter - $50
- Rear Brake Lines - $70 (they are just rusted out, might as well change them)
- BSR Stage 1 tuning - $700

also should i invest in a front sport bushing kit?

thanks, any and all feedback is appreciated