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I agree with dousan, little to no difference in ride quality with spherical bearings.
I run 8 degree's of caster. Takes a bit more steering effort, but makes the car corner better, and more stable.
Steeles - positive caster will move the wheel forward in the wheel well. A shorter T/C rod should increase caster...
note on poly bushes.. they don't like twisting. The whiteline units being tapered helps, but MAKE SURE, TRIPLE SURE, that you put LOTS of the grease b/w the insert sleeve (that the mounting bolt goes through), and the bushing itself. Once tightened down, the sleeve will not twist, and the poly bushing will need to twist AROUND the sleeve. if it can't, it will eventually tear the T/C rod out of your control arm, and you will have to buy new control arms, and possibly new t/c rods as well. Rubber bushings, and Spherical bearings do not have this problem
Also - I own the dspeed t/c rods from PS and they suck. The bearings are rusting, and don't move real well any more. I'm going to be replacing mine soon. I would recommend something with a rubber boot on the bearing, or make sure the spherical bearings are Teflon impregnated.
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