I think I will just stick to upgrading whatever car I get suspension. Talked to my grandmas mechanic and he said basically upgrade bushings and any engine parts first, then upgrade the suspension like how I though in terms of struts, strut bars, and sway bars. He said coilovers should not be a big deal but if they are then he will help me out. Basically my mechanic is going to look over the car to see what needs replacing, what would be good to upgrade first, etc.