Go with Moog ball joints. A bit higher than most brands, but they've got metal guts inside where most have teflon internal bushings. I've seen a cut open joint, and THEY ARE DIFFERENT THAN THE CHEAPIES!
DON'T let AutoZone fool you with their lifetime warranty crap, if they still have it on their suspension. Lifetime with them means a lifetime of laying under the car twisting wrenches... :no: