Newer computerized machines are not reliable like the old mechanical machines.
Be sure that you have a dealer close by to get maintenance done.
My Viking is being stubborn so Im using my old $89 Brother to sew on. The Viking was $1100.
One of the things I liked about the Viking was when you stopped sewing the foot will lift just enough to slip a piece of fabric under it. My old Brother you have to lift the lever to lift the foot.
I also love having the drop in bobbin instead of under the machine kind.
Get as large of a throat as you can. Its much easier to shove the quilt thru if you are using it to quilt a quilt.