I started this route a few years ago. Just using the 2" spacers will limit travel on your suspension which would only be an issue if you want to go off-road. If it is just to improve stance on road with some usage on rough tracks etc then probably not worth paying for shocks.
With 2" lift you can fit 31" tyres but you will also have to adjust steering stops to prevent rubbing on the control arms. I only ever fouled on the front wing when on full lock with the ARB dislocated.
HTH