I am interested in improving the handeling on my 2000 GT 'Vert. I have good tires (Michelin Pilot Sport A/S) and shocks/struts (Edelbrock IAS Performers). I do not race the car and I still want a good ride. A Mustang shop locally suggested installing Eibach springs, I am assuming they were takling about the Sportline springs. Is there anything else I should consider, such as control arms? I also already have installed frame braces and shock tower brace. Any suggestions appreciated.