DO NOT take wheel tire advice from just anybody on here. eveyrone has their own version of "cool". some people think that the smallest tire possible on a 9 inc h rimis awesome. i, however, think that a 215 on a 9 inch rim is queer.
here's what i'd do:
mount the rims to see where you sit as far as offfset and clearance. look around to see how much space you have for tire.
then get as much tire as possible
235s at LEAST for an S14. we S13 fellas are stuck at a measely 225.