Marcel, if you need info fast, i might recommend a search. when contemplating mine, i must have read a couple hundred threads here and at the other site.
based only upon what i read, i am not a fan of fluid style dampers on DD's.
for decent dampers on a stockish car, what i might do:
LRS sells a PP street unit - around 80 bucks and it should include the spacer (which other places can gouge for).
Pioneer makes a street damper for under 100 bucks - it is available at some parts stores.
good luck.