I had Hotchkis slalom leafs and Global West Delalum bushings up front with Gulstrand mod prior to my "real" build. And a Hotchkis front sway bar and 76 TA brakes. Handled decently, but I never autocrossed it so I couldnt give you exact numbers. Brakes sucked, but better than stock drums. Someone mentioned the Chassisworks 4 link, I just had one installed, but that alone would take you over the $3k mark. If I only had $3-5k, Id probably do the Hothkis leafs, DSE front speed kit with tubular uppers and lowers with coilovers and sway bar, tie the subframe together with subframe connectors, go with QA1 or Varishocks, and beef up the brakes. SSBC has a decent kit for both front and rear brake conversions. Also think about a quick ratio steering box since rack and pinion would set you over. $2500 would probably cover the front end, $2k to $3k for brakes,rear suspension, and connectors. All this assuming you did the labor. Or like someone else said, save your dough for a few and go with a DSE, Fatman, Alston Chassisworks, etc. setup later and get the best of everything.
BTW, I think it was Fesler saying "BUILD IT RIGHT THE FIRST TIME ITS MUCH CHEAPER" !