Finding a machine you like is a tough thing - it is hard to determine its capabilities in a short test drive. I have been using a 1967 Kenmore - and a vintage Singer 301A for the majority of the piecing that I do. I have also used these machines to do machine quilting as well, and I am very pleased with the outcome. Perhaps you could check Craigslist, antique shops or sewing machine shops that have trade in models available. I have a new computerized machine that I rarely use because I prefer the vintage ones.
Good luck in your search.