$ always determines your options. If $ isn't a factor, like the others say: Tokico/Koni adjustables, sway bars, & upper strut bars.
If $ is a factor, non-adjustables and an upper strut bar. You'll still notice a considerable difference with just these mods. I currently run Tokico blues (non-adjust) w/Neuspeed sport springs & upper strut bar and it's pretty decent. I can use sway bars. GL!