The 1600 is known as a true workhorse of a machine.
Nothing fancy ... it just stitches!
I had one on loan while my machine was in for repairs one time, and put a lot of miles on that machine.
I was definitely impressed and would highly recommend it, as I really put it to the test, through many layers of fabrics.
I have also met a seamstress that had the 1600 in her shop, and was so impressed, that she bought a 2nd when she needed to add an extra machine.
I assume you can lower its feed dogs, to be able to do FMQ.
If so, I think it would be a charm.
Keep in mind, that it is not the newest of machines available ... and be sure your price reflects that.