Nik is on the money, as usual. If you go with used parts, you'll get all of it done and still have a little money left over.
If you can find a deal on an explorer, Cobra, or GT40 intake, that's damn good bang for the buck, too. I'd definitely go with exhaust mods first, though.
I don't personally think a lot of money should be paid for subframe connectors when you can just go to a machine shop and have them made for next to nothing.
If I were starting from scratch and going part by part again, it would be in this general order:
ten-minute tune up (remove air-silencer, 14* base timing, remove dog-bone, remove spare, remove sway-bar)
K&N panel filter
Pullies (w/o alternator pulley unless you're running a 3G)
Subframes
Shifter (Stock sucks)
full exhaust (w/ long-tubes)
gears/new clutch packs (don't forget the friction modifier)
Intake/TB/MAF
springs/shocks/air-bags
Torque boxes
Axles/5-lug swap/disc brakes all-around
Drag-Radials/Slicks-Skinnies
Fuel-pump/AFPR/MSD ignition
Clutch/Transmission/scattershield (or when the T5 blows)
Heads/Cam/rockers + n/a tune
Nitrous(125-150 shot)/F.I. (8-12lbs boost) + FI tune (500rwhp or less with conservative tune and 6000 RPM cap)
I'll let the guys pick this apart and add stuff that I missed, but this is the cookie cutter layout for me
I'm not a big believer in the aluminum driveshaft or flywheel, though I've had the D/S. I'm also no longer a big advocate of electric fans. All of these things might yield some advantage, but they're incidentals to me that I wouldn't add until after I've done everything else and still wanted a little more.
Good luck in your build,
Chris