Should get the basics because then you can build from there.
After market Air filter (apexi are good)
After market Exhaust (Blitz nur spec
)
After market manifold (important)
After market front mounted intercooler (HDI)
Adjustable actuator (toy tuning or hks)
You would be set then for turning the boost up a bit but its not worth running 1 bar if it blows up. I had the above and handling mods such as coilovers and running 0.7 (before fuel cut) and it felt fast and nippy
Ive sent you a pm as ive got an adjustable actuator for sale