I wouldn't skimp on shocks. I assume you are having traction issues or are planning to run faster so in either case I'd spend the money and get good Dual Adjustable shocks on all fours.

Viking seems to be the pick for a good shock at a good price. I went with Afco's with Mencer valving because of their reputation and support (their techs provide support even on weekends). I now have a car that hooks in a car wash and have no concerns with them being able to handle anything I throw at them in the future.