OP - Admittedly I have little recent experience with some of the speakers you mention, but my Monitor Audios make me smile as well. I am curious as to your quandary whether MA “…will be around for the long haul.” Maybe you know something I don’t, but MA celebrated their 50th anniversary last year and are still (very) actively releasing new products. While I choose my Gold 200 floorstanders purely for the sound I also felt good that they seemed to be a very stable company. I’m including a link to their company timeline below.
Monitor Audio Company Timeline
Good luck finding what you’re looking for.
Matt