I don't think there's a 'best' air fryer. Just pick one that's the right size for your family. I use this Breville Smart Oven Air Fryer daily, but I also like this family sized basket-style Cosori Air Fryer XL 5.8Qt air fryer. Of course, use the one you have. If your air fryer is on the smaller size, just cook the meatballs in batches! It won't take too much longer.