I bought the Tin Lizzie 18 and now wish I had a better frame. Maybe wish I had bought a nolting but oh well not going to change now. I am getting long and don't do it professionally. Machines now have a computerised quilter to add on if you want it. I do like the stitch regulator. And a good dealer.
BTW Nolting and AQS mfgered in Iowa. (Where I am)