It all depends on the amount of money your're willing to spend. A great setup would be to get some type of performance coilovers like Donohoes, Sway-A-Ways, Fox, etc. for the front. These will run you from about $600 to $1000 and over. As for the rears you can get custom leaf packs from Deaver or Alcan and those will run you another $500-$700.
If you're a cheapie, Fabtech makes a good all around kit, not sure how much those run, you'll have to check up on that yourself. Below is a link to all the pros and cons of the different suspension setup for you, hope it helps you out.
http://www.CustomTacos.com/tech/inde...v2&id=137&c=10