Get FMIC, boost to 1 bar, and ECU.
ECU will get rid of 180km/h problem, plus more power to play with.
Make sure the one you get has the 4 pot brake calipers. You can never have enough braking power.
With any tubocharged car, if you want more power, say goodbye to fuel economy. If you want fuel economy, then get a stock car. If that's still not good economy for you, then get something else cause turbo cars love juice unfortunately.