I'm looking for a machine that will puree veggies, green leafy ones in particular. I have a 4Qt KitchenAid, but it takes forever and I'm having trouble finding a replacement blade. The smaller smoothie makers would take too long and I would have to add water. I make dog food and have to puree large amounts of veggies. Does anyone know of a good machine - 3.5 to 4qt that purees?