New or second-hand Forester better?

Just some advice and insight please on the Subaru Forester which we are considering for me to drive. We have three children under 10 with one in a basic booster seat and we live in a semi-rural area where a few kilometres of our road is one-lane and you need to straddle the road edge if there is an oncoming vehicle. We're not sure whether to spend the extra and buy new or whether a model a year or two old is just as good.