you'd best be saving up for a chip its around 500 buks but thats the best bang for your buks, then do either exaust or wheels/suspension...
you can get the chips at
www.ecstuning.com www.awetuning.com or
www.goapr.com
btw if you want the "woosh" sound just do a DIY intake mod its in the DIY-Do It Yourself section of this forum
what engine is it? is it Quattro? can we get some pics?