Be sure to join the homequiltingsystems group at
http://groups.yahoo.com . There is a lot of comparison information in the files there, plus you can read through old posts and ask questions. It's a very active list with quilters who have all kinds of different setups. From reading posts there now and then, you can be pretty sure that a domestic machine will get frustrating pretty quickly because of the small area available for quilting once you start rolling the quilt. Quite a few people like the HQ16.