I have a Bernina that I love but I recently bought a Juki TL2010Q because I want to FMQ and the throat on my Bernina wasn't wide enough. The Juki is straight stitch only- perfect for FMQ, and my Bernina does everything else.
I also have vintage Singers that are fun to stitch on, especially my Featherweight. I just love that one for piecing.
So for me, I have every machine I want.
It's a very personal decision. You have to figure out what you want/need that you don't have and go from there. There are a lot of threads about machines on this board.
Prices are all over the place.