As far as I know, the Bernina is the only DSM with a true SR, the BSR. I have the 440QE, and learned FMQ with the BSR. When I got a longarm (Innova) I bought it with the standard SR, and it did a great job. While it was possible to move your hands too fast with the Bernina and outrun the SR, that didn't happen at all with the Innova's SR. Last year I upgraded the Innova SR to Lightning Stitch, a much improved SR that wasn't available yet when I first purchased the Innova. There are differences in the ability of a SR to provide even stitches when you start suddenly, make jerky movements, or go in and out of points. Innova's standard SR is good, but Lightning Stitch is even better. It's a pricey upgrade, but well worth it IMHO.