Since we have a few photos of machines, this is the type I use these days. I own a couple of technically very good versions of this model that came from the original owners in the country. They are fast enough, stitch quality is very good once you know how to adjust your thread tensions correctly and they take cams for non-standard stitches which at times can be very useful.
(http://www.movsd.com/photos/elna62c/elna62c.jpg)