I bought a used APQS ... something or other. I think it was the 22 inch one or so. I sold it about a year after I bought it. It's hard on your arms, shoulders and back. It took me 3 days to quilt my daughter in law's quilt and I was never so happy to sit down and do binding.
Even if I had room and money I still wouldn't get another one. I'm happy to sit down and quilt on my Janome 6600. It might be a little work to shove a queen size quilt thru it but I can also use that machine for other things and it wasn't that expensive.