I didnt know there was a OE Sport spring? Is that the same as just the sport spring? I believe the OE just designates that they fit directly without modification.
No, the car will nto sit higher, but the reason ti can prevent rubbing is that it is stiffer than stock.
Heres what i recomend. You put the shocks on full soft when you drive because you really arent looking for pure performance all the time. When say 2 - 6 ladies decide to pile up in your backseat (no dudes, its just not cool) you pop the hood and truck and twist your shocks onto full stiff. (trunk is a bti difficult to acces btu if you anticipate a lot of passenger load you should do it in advance). This way you will hopefully prevent rubbing with the super sporty shcoks, BUT your ride comfort will greatly decrease.
Koni sports are the way to go as far as shocks
for springs you should go with either H&R SPORT springs or Eibach PRO KIT.