No scraping at all, with the 14" wheels it won't look too low either ie. there'll be a gap inbetween the arches, but will physically be a lot lower than standard.
Put it this way; I'm about -90mm, if not more, on 17" wheels and there isn't too much scraping! There's a guide on here on how to fit springs yourself, if you have the patience it will save you a lot of money. Garages usually charge around £50-100