With the way leafs can be played with these days to can make a big difference depending on the way you want thing setup! Shocks also make a big difference on the rear to so a good quality shock could make a big difference! Some people use tarago shocks and some ppl use a 4x4 shock, I've used heavy duty pedders shocks and have had no problems! There are a set of kyb shocks fs here they are good!
I'm yet to try Retrorallys setup in my coupe yet which is Bilsteins shocks and spherical bearings in leafs!