get shocks first. I really find it to be a pet peeve of mine when people go crazy with sway bars and still have a relatively stock shocks/spring set up. There's alot of drawbacks of going with sway bars that are too stiff compared to your springs, sure it may feel nice in a big, nice sweeping curve, but overall the car might be losing grip in tighter situations. Sway bars are really one of the later mods, for when you have found a good shock/spring set up, and you want to further tweak the balance of the car. Ideally on a track car, if you want to reduce roll, adjust the roll center and/or spring stiffness, but of course for a street car that's not feasible and sways come into play for reducing roll, but it's imperative not to go overboard and use SOLELY sways to reduce roll.