I love my Singer 301 (actually have two of them!). Have never owned a machine that has such a smooth, beautiful, always perfect stitch. I have a new Singer Confidence Quilter, and it sits gathering dust most of the time, unless I need a zig-zag or fancy stitch!
I'm in the process of restoring a Singer 127 treadle--just because I love the way they look and have always wanted one. But now that I have it sewing, I think I will use it too. I also love that the vintage machines are quality, but simple to work on. I do all the cleaning, oiling, adjusting and in the long-run save a lot of money!