Hi there
If yours car is still standard then I would go with OE parts,but I would upgrade bushes at least to the Powerflex,they will make bit difference,polybushing the car can makes bit of difference
And about the Ball joints,we are run RCA kit on our Subaru and there this transformed the car to different monster,although our wagon has run coilovers as our EP3 running coilovers and is lowered too,on lowered cars I always recommend go with RCA kits like is Buddyclub or Hardrace
This picture should help you to understand what I mean
Hope this helps
Thanks,Jura