As Kym, said, a budget would help us a lot.

Cosmetics: Do you what makes you happy. There are enough opinions in this thread and there are a few cracking looking bug-eyes on perth-wrx.

Maybe someone can throw up an exterior pic of BALISTC, a damn fine example of a bug done perfectly (if money is no object I must add).

Handling:

Lowering springs (no more than 15-20mm if you want to preserve the OEM struts)
Adjustable sway bars (Whiteline / PERRIN / Cusco, there are a lot of brands)
Anti-Lift kit (as above, many brands)
Roll centre adjusters (as above, many brands)

Do those 4 basic modifications and you will immediately feel the difference in the way the car transfers weight through a corner (much flatter and more composed). Best to go see the professionals @ STechnic or Wheels World and ask their advice for a setup (there are a lot of different setups for sway bars and they all suit different drivers/ driving styles, one size does not fit all in this regard).

Happy modding mate