i would vote a good strut/ spring combo. Ask around for some of the common strut/ spring rate combos for your car and style of driving. talk to people that actually know what they are talking abot. Erin posted above, i would talk to him. he seems extremly knowledgable and has an S13 also, not to mention he is a great driver. Maybe there are some 240 boards somwhere that some tech savy people can help u out? but it sounds like ur budget doesnt allow for suspension worth buying, tires, fuel ect. Tires are always your best upgrade when it comes to unsprung upgrades. GL