im not sure what type of performance your looking to get out of the
suspension but just be aware that most kyb's are significantly higher in the performance category than stock...thats why there only $140 on ebay for all 4...if your looking for better performance i would look into some better brands.. ie: strange, bilstein, QA1, ect... an adjustable front and rear will help increase your weight transfer... although, i saw you were looking at sportines which really kinda kill the weight transfer anyhow cause there more of a street
suspension...