What next?

come to a bit of a dead end on what to do next to my zs, was looking for some ideas, so far i have done exhuast, airfilter, cams and pullies, de cat, lowered, tinted windows, mp3 player, subs,amp, 6x9s, xpower sunstrip,

just put some new front and rear discs on in the summer so dont want to upgrade them just yet, any ideas peeps