We rate the new Kia Sportage highly – it's probably the best family SUV you can buy although it's not as affordable as it once was. The Duster is smaller and cheaper (and feels it, to an extent), while it doesn't have the same tech as the Sportage (and that's reflected in its mediocre three-star Euro NCAP safety rating). It's going to be a while before the Dacia Bigster arrives (potentially another two years). As an alternative, take a look at the Skoda Karoq.