your car is about the same level of mine.
my next step would be turbo.
-HKS 3040 unit is an excellent match. bit laggy but will get you the power you are after easy. water cooled too.
-external wastegate (the unit only comes with external wastegate)
-exhaust manifold (have to get it in order for the turbo to fit)
-injectors (size is up to you, around 700cc would do)
-custom plenum (to get the most out of the big turbo)
-fuel pump (you are increasing air flow so you will need an increase in fuel)
if you have money to spend (and it seems like you do) strengthen your internals too.
also don't make the mistake of ignoring your suspension as this plays an important part to your overall speed. many ppl just go for the go-fast-bits and forget the one thing that makes your car fun to drive.
goodluck;)