I've been using BS all my life, until recently when I just 'had to' try out a FS.
My most recent BS stayed with me for a year. Honestly, I was very reluctant to let go of it, as I was very pleased with its sound. But then, like I said, I just had to try and own a FS. At first, it sounded like some of the detail that I enjoyed with the BS was missing, I was somewhat disappointed, and I felt that the BS integrated better with my sub. However, after several nights of experimenting with positioning and sub crossover, I finally got the detail that I wanted, plus better mid-bass. Needless to say, my FS will be here to stay with me for many years.
This is just to share my personal experience with everyone here..
Like someone said, it's a matter of synergy, and that makes possibilities endless with this hobby of ours.
Does my system sound perfect to my ears? Still no.. and I think a subwoofer upgrade is my next step forward, but that's another story.