I prefer from experience having two seperate machines. One to sew and one to embroider. I purchased the Bernina 630 last year, but I really am not happy with it. It weighs a ton. Paid 4400 for it and got the embroidery module and BSR.
I don't like the threader, or placement of the bobbin on the side under the table. I have to pull the table off to change, or check the bobbin. You cannot pull the thread from the back to unthread as it messes up the tension, and I have a hard time remembering that. The needle has to be recentered every time you move the machine. The feet and accessories are expensive. It must be serviced every year. My list goes on and on. I really wish I had tried sewing on different machines. I love the two Brothers I have. I just needed a bigger hoop capability and thought I would like the BSR.(stitch regulator) I wish I had spent that money on a Janome, Brother, or Baby Lock.