Thank you both for the help!
Kerriy, thanks for letting me know that Pfaff has a similar machine. I didn't find one with a knee lift when I searched. I found other machines with needle/down and thread cutter, but not knee lift. It's nice to know that Pfaff has a machine with all those features, because I love Pfaff machines! By any chance does your machine have a low bobbin alert or second motor just for winding a bobbin (so you can wind a bobbin while sewing)? The Janome 6600 has the second bobbin motor, but not a low bobbin alert. It also does not have free arm capability, and the bobbin is accessed from the top of the bed (which I don't like because it is under the fabric and not easily reached if a thread gets caught in there.)