I have a Sport which I think has the same size sway bar that your car has. I think my car handles extraordinarily well, and have no plans on doing these mods for my car
But if you want to mod it, try these:
1) increase the diameter of the rear sway bar -- you could even install a used one from a WRX or STI
2) There is an aftermarket bar that goes under the hood to brace the two strut towers.
Those don't involve any big mechanical gift or skill, you don't need to remove any suspension pieces, and would probably give you the biggest bang for the buck.