Have you read any of the previous posts that you can find on advance search?? You have to decide what options you want to have on your DSM and what you can afford. I am sure that if you enter any type of DSM on Google search, you can find the exact information on what options are on which machines. I have an old Bernina 1530 and I love it. I don't need a larger throat, I don't need the cut off thread or the last beam. You just have to decide what options YOU want and if you can afford those options. Good Luck and remember to have fun shopping.