I love my Singer 403A for piecing. It has a lot of power and it's been my main machine for over forty years. In second place is the Singer 99K portable. I do not have any vibration issues with it...In fact, just the opposite. It runs so smooth and the stitch is just gorgeous. I know I'll disappoint some people, but for me, the featherweight is just too light. It jumps and slides all over the table when I'm working on bigger projects.
~ Cindy