I can machine quilt a King sized quilt on my Janome 6500 which has a 9" harp area. I've thought about buying the Janome Horizon with 11" of space but probably don't really need it as my present machine will work. I did see a HQ Sweet 16 in a table for sit down home use with a huge (16") harp but that set up was priced as $4500 which means you need to do some serious quilting to justify spending that amount.