Which model is right for you depends on what you do with it most often, and what you think you need to be able to do from time to time even if not very often. If you are going to be kneading a lot of bread doughs, for example, you might need a larger/stronger/more $$$ model than if you mostly make cookies and desserts. Also consider your storage space, and how heavy is too heavy for you to move it around.

If you decide to stick with KitchenAid you should know that you can buy directly from the company web site and there are some (real, not phony Black Friday shit) sales there right now.

I just gave mine away. In perfect condition but too heavy for me to lug around.

one when they came with the glass bowls, but elected to sell it in my estate sale and kept the old one.

We have had ours for 57 years. It has survived 7 moves and it still works very well.