You could ditch the spacers and get a 3 inch lift. Wouldnt look bad with the 31s. Most people add a 1.25 body lift along with 3 inch suspension for 33s. So when you buy new tires you could get 33s and a body lift to go with them. And either get cool bumpers or rock sliders with the left over money or stash it away for your tires later on
1998 Jeep Wrangler, 4.0 I6
33x12.50 Goodyear Wrangler Duratracs
3 inch Zone suspension lift, Rubicon Express adjustable front track bar, 1.25 inch body lift.