First worry is to find a neat ST. After I found one I will decide what I want to change and what not. In the basis I like an original car when looking at it, meaning only ST rims, standard exhaust, no aftermarket spoilers etc. For comfort and performance I might alter some things. I have to admit I am already thinking about a K&N kit (even without owning an ST..) but I think I will drive it as is for a couple of months first.
But I know for sure I will not mod as extreme as some people around here (although I like the results!). I think..