I went to a class for machine quilting many years ago and had trouble with my machine. The store was a Bernina dealer and gave me a machine to use. That was the end of it for me. I came home and told DH I HAD to have a Bernina. We had one income and four little kids - we could not afford a Bernina. I coveted for a year or two and then budget be damned, I got one. I haven't been sorry for a single minute, have never had a minute of trouble and wouldn't sell it for anything.
I have thought about getting a backup beside my FW and have looked at Viking and Janome. Can't say I won't ever do it but I just can't imagine I would choose to use another machine when my Bernina is sitting there.