I've got tein flex coilovers, ST sway bars, tension rods, traction rods, f&r upper control arms, and e.s. polyurathane bushings on my Z and it handles amazingly. I plan to use a similar setup on my 240 when I get it. I may give the megan racing coilovers a try or the k-sports. I've heard good things about both, but I have no first hand experience with them.