South Bend, Atlas / Craftsman and Logan / Montgomery Wards 9" and 10" lathes were super common, and are still probably the most common home lathes around.
The 9x20s are not a bad option for a compact lathe, they will be noticeably smaller than a 9" vintage USA.
If you can find one in decent shape, even a change gear 9" or 10" USA lathe will be superior, but finding one in decent shape is always the issue. Most went out of production by the 1970s, so you are looking for machines that are typically a minimum of 50 years old. Age doesn't really matter, it is all about how they were used / cared for. Lots of people have 100 year old lathes that are still in great shape.