It depends on what springs you have and what your performance needs are. An agressive spring on cheaper shock is stupid cause you are still likely to blow your shocks so you may as well get good ones. If you are down around 2 inches I say you don't have much choice: Koni Yellow, Bilstien, Tokico adj., and KYB AGX's, although some would argue only the Koni's and Bilstiens are truly up to the task. The way I see it is that it is worth the money to buy good shocks that you know won't blow out on you, rather than trying to save maybe a hundred bucks or so and getting a cheaper set that you might end up replacing in a year or so.