A strut bar alone will hardly improve your handling. To really feel an improvement, you'll need a whole new suspension, meaning struts/springs or full coilovers. For whipping around corners, you'll want to reduce pitch and lean. Here's a story for you. A member on IS300.net(now my.is.net) threw on all the chassis bars he could get his hands on without upgrading his stock shocks and springs. So his setup consisted of front/rear strut bars, front/rear sway bars, and chassis member braces on stock struts and springs. He decided to take the car hard through a canyon. The chassis didn't flex. However, the car still had pitch and lean. Therefore, his car lost control and flipped over into the canyon. The initial suspension is more important.