I wouls say...
Bilstein Sport shocks, H&R race springs, H&R/Eibach sway bars, X-brace, strut tower brace, E36 M3/Brembo brakes....
You might want to upgrade your bushings all around as well to urethane or solids... oh I forgot to mention an LSD as well since you're changing tranny anyway...
Forgot to mention R-compound tires HELP A LOT as well!!!...