a) 15s - Pure performance - need a big drop to fill the arches, 60mm IMO - 195 tyres so no rubbing issues.
b) 16s - Compromise between performace and style still need a decen drop to fill arches 50mm IMO - 195 tyres so again no rubbing issues, unless you go further the 65mm then you may do.
c) 17s - Pure style, will siffer performance drop - slower acceleration, increased stress in certain components - need less of a drop -35 - 50mm drop max - wider profile tyres 205 (although can get 195s to fit), so may /will suffer rubbing issues in arches / bumpers.
Hope this helps
Anthony