My 1st mod was gears, get 3.73, and with labor it should leave some $$ left for a shifter. Then you will have what the KR has. I will be installing a Dynotech DS this week end, with a BMR front loop. That should be on your list after the gears and shifter.
I'm saving for a Laser Interceptor HD unit, Griggs Suspension, then some form of a TVS upgrade +/- exhaust.
Already done Tune, CAI, pulley, gear, and some electronics stuff (stereo+GPS/Escort 9500ci/homelink), KR shifter, 180 stat, plus new LCAs next week to keep me happy until I can afford the griggs. Gotta say each mod has been highly satisfying. Someday I'll get around to installing the shelby plaques sitting on my desk too - he's getting old you know, might want to get those before its too late.
you just can't go wrong as long as you know what your goals are.