The biggest quality concern isn't that something will break but the quality of the support I get when it does. If the closest dealership+brand repair shop is two hours drive away and all the major brands have repairs 5 minutes drive away, then it's not competitive. The moat of the established brands is pretty big when it comes to the service network.
True on parts availability - a friend bought a hot hatch from Peugeot - it was one of those performance models with a tweaked engine (higher rpm/camshafts) instead of the run of the mill ones.
So engine imploded and he waited months for a part that was on a ship somewhere - they eventually bought the car back from him.
