Wow, thanks Fraggy, awesome comparo. I guess you concur with Will Turner's (of Turner Motorsports) advice that PSS10s are "Hands down, the best single modification that you can make to this car." Most of the moderate - high end coilovers (KWs etc.) provide similar results. But pricey -- 1500 parts, 500 labor.
Direct comparisons among coilovers would be helpful here -- what specific characteristics make one or the other better suited to your driving needs.
Posts with objective data -- e.g., dampening curves, race results -- and subjective SOP feelings are both useful.