It depends in my opinion. Many variables with this company and what you seek as well as preferences. Do you want a three bank typewriter? I would go with an Erika 2 for a three bank typewriter. Do you want a more modern typewriter? Perhaps an Erika 10 is a good choice.  Do you want a certain font? Maybe Fraktur? (Good luck finding one for cheap however) Erika 5 would be a good choice for fonts maybe. Do you want a rare and collectable model? Go with an Erika 20. They have basket shift too. I would personally avoid the newer models, such as the Erika 50. They aren't great in my preference, but you decide! There are many different models for different people, but the main company that produced Erikas, which is Seidel & Naumann, also created the "Ideal" brand of typewriters. S&N is responsible for a lot of typewriters.