No matter the name on the machine...I think there are 3 important things. One is that the tension doesn't need a lot of adjustment; two is that the thread doesn't bobble up on the underneath; and three is that it will sew thru about anything.
Test drive the machine. I have noticed that there are some low end machines that you have to keep a lot of pull on the fabric. If you have to keep a lot of pull on the fabric, I would steer clear of that machine. Fabric should feed through the machine with "no hands".
I would go to the top line dealers and see what they have available used first.