I'm not sure what your price range is. That's a very important thing. If you are just looking for piecing and want something new (I am not a fan of vintage machines. I like my newer stuff like thread cutters and needle threaders not to mention a warranty).
A bit over a year ago I bought a Juki 2000 which I love. Others get the Brother 1500 and there's a Janome also with a 9" span that does straight stitch only. It all depends on your budget but I'd go for a straight stitch only machine. I love mine.