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KW V3 are an awesome coilover. I run them in my cars. Ive had pss9 before and they are great also. However with your budget, these are in the wrong ballpark.

For your budget i would look at bc...

After owning many new cars the trick with negoiating i found is know a price you want to pay. Get up and walk away mid negoiation if they say thats the lowest they can do. Trust me they can do lower....