I also have the Janome 1600P. FYI, the Brother 1500s is essentially the same machine. The Janome has a speed control, the Brother doesn't. The Brother has an auto needle threader, the Janome doesn't. I really like the needle threader, and I can control the speed with the foot pedal, so I prefer the Brother. Hope this helps.
p.s. What's the "QC" for? Mine is a "DB" which means it takes round needles.