Building as low as possible and pressing 3. The trick is getting polys where polys are needed. Don`t get me wrong these are not game models but 100`s of poly`s are not needed iva - so adding extra lines here and there to keep the shape when smoothed does not hurt. The other thing is quads, quads, quads. Anything else just looks wired when you use the pressing the 3 option. After that its just rendered with metalray (at the mo as I have looking at other options)