Ride quality is very important to me - but i want to lower my car. should i go with the Eibach pro kit, H&R, or TRD? in eibach's case, the 03-08 and 09 springs are the same. assuming thats the same deal witht he other brands... anyway... what do you all recomend? and if someone can type a brief walkthrough on swapping springs (tools to rent too) i'd appreciate it.