The older Singers had great motors, metal parts, and can be mainted for unlimited use. With your budget, I'd save the cash, continue with what you have for now. Especially since it's working for you. Many low-end new machines have a lot of plastic parts. If later you want a machine that does more, reasearch for a good quality used machine. Hopefully you have a local store that carries your machines accessories, parts, classes, and maintenance is a good way to go.