If you are going to do machine quilting then get the one with the most throat space in your price range. They all are about the same some withg a fewer bells on them but most of the newer have the same additions.
Ignore such things initially like thread cutting -. and decorative sitching.....go for the space. You will be glad you did. To me the 6-7 or 8" throat space is useless for serious machine quilting - go for thge 10-11" you will be glad you did. You can always raise the foot with your hand and don't need to button to punch. You can always control the motor with your foot and don't need the start and stop button. space space space.