I have a middle of the line machine. Started with a low end one as a Christmas gift. I have always sewed a LOT. After a while I burn out the gears and up grade a little. I do not see the need for a top of the line machine. There are a few things that I do look for such as needle down and Drop down feed dogs. Most of the features I would never use. Just stick with what you can afford and what you will use at the time.