Get the whiteline front castor bushes, biggest and cheapest single change to reduce the understeer. K-Mac also still do adjustable strut tops, their quality control lacks a bit, but the adjustment you get is pretty massive. I think Noltec used to do some strut tops as well that are pretty good if you can find a set. Note that the tops are going to be limited if you are not running coilovers, as the big stock spring can only move so far in the shock tower.
I've got the 26mm rear sway bar, the nolethane bushes for the rear subframe from galantvr4.org (american site), front castor bushes, front fully adjustable strut tops and bilstein coilovers. The rear is REALLY planted. The sway bar and those bushes were about equal in the difference they made. Front in comparison now feels a little 'floaty' and I've been wanting to look into how to make it feel a bit more steady. I've avoided stiffening up the front as most people say it tends to increase understeer rather than reduce it.
The other thing that makes a massive difference is a rear LSD. Pushes so much harder out of a corner and so much more predictable. Open diff tends to suddenly snap into oversteer and snap back when you push it too hard, whereas LSD will be really gradual and you'll feel it long before the rear tries to start overtaking you.
