[blue00gt]

I'd get some caster/camber plates also. After that and the front struts you will have a solid foundation for handling. To go much further with it you need to make some choices and part with alot more money. If you want the ultimate in handling you need to get a tubular k-member up front with revised geometry such as Maximum Motorsports, Griggs Racing, or Kenny Brown. Also, for the rear you will need either a torque arm/panhard setup like Griggs or MM, or the Steeda 5-link to get rid of the horrible stock design that binds when you try to corner.
With the parts you named that you already have you will probably notice that you can overheat the stock brakes pretty quickly now on windy roads. Either a Cobra or Baer front brake kit will take care of that. I've actually seen the Cobra front upgrade for under $400 for rotors, calipers, and lines here: http://www.mustangracing.com/.