Before you decide on a brand or unit, make sure you give it a go first. The dealer won’t have problem with it. All you need to do is take a few swatches of thread and fabric to the store. You can then stick the fabric in order to find out how the machine works.
Make sure you pay special heed to noise, smoothness, and stitch options before making the ultimate decision. In case you are not happy with a unit, be sure to look for another. It’s better to test a variety of fabric at the dealer. This will help you prevent surprises later on.