yah, defintely get a swaybar set if you aren't planning on getting the koni's. progressive rate springs are soft on turn-ins and initial bump.
if i was to do springs i would get the koni's in with the springs and decide later if i need the swaybars. ive already messed with my G (and a few cars) with just running prokits and they suck by themselves. ended up installing adjustable dampers later or got coilover set if i could fine one with the right spring rates.
on my Z, so far ive kept it stock as im pretty happy with the ride. damping is on the soft side so i might do the koni's on stock springs down the road.
