With a budget of 500.
green filter, pd160 intake, remap.
budget of 1,000,
green filter, pd160 intake, remap, coilovers + spacers.
also look into front mounted intercoolers, brake upgrades (312's off of other vag cars), exhausts, turbos lardy dar etc etc.
everyone is different, i personally done breather mods first (exhaust and induction), brakes,
next will be fmic and suspension.
Clutches cannot be to friendly to remaps though if your heavy footed, so that maybe on your list of upgrades. depends if you want cosmetic or performance.