Wrangler hardtops
I run either Doestch-Tech 3000's or Rusty's Offroad Hydro's. The DT3000's are the best riding shock I've found, they're about $30 each and have a lifetime warranty. They're a hydraulic shock and much smoother riding than gas charged shocks (Nitro's).
I wouldn't spend the cash on adjustible shocks, put some good smooth riding shocks on and forget about 'em. That's money best spent somewhere else.