I'm finding all of your comments very helpful. I'm also trying to decide on a sit down model. I simply don't want to give up the space a frame would require. (besides, our 2 cats would think it was their personal hammock.) I've looked at the HQ sweet sixteen and the Gammill Charm. I love that the Charm can be controlled using voice commands, making the foot pedal unnecessary. I've been sewing on my Janome 6600 for 3 years and have become spoiled by the on/off button and speed control. I also have a problem with my calf muscle when I sew using the foot pedal.
Are there other sit down mid arms which will allow me to bypass the foot pedal?