There are a few shocks we have tried and all have been 'better' than stock. One of our members had good luck with the Banshee shock 'right out of the box'. Many others found the stock Banshee spring much to soft. Since you are not a heavy guy, you might give that a try first. Should that not work, you can purchase a stiffer spring.
On another note, I just sold my Baja Bug to a fellow that 'winters' in Baja. He mentioned some very small 'town' on the gulf coast. Should you see this rig, likely it will be driven by Wayne. Say hi for me. Gerry