Has anyone ever switched to Harbeth

I don't if it is boredom, but the change would certainly quite different. With the Harbeth being warmer. They are different enough for someone to have a clear preference. I personally have always liked the Spendor/Harbeth type of speaker. But that is just my personal taste, I'm sure there are others that would clearly prefer Dynaudio. I think OP is on the right track; try a used pair, you'll know pretty quickly which "house sound" you prefer.

They seem close enough that if I owned one I would only choose the other because I was bored - that is not a big change in persepctive as Dynaudio Harbeth move would be. I do think neutrality and resolution is a house sound; that some like and others not so much; Dynaudio always left me feeling a little cold, but it could have been the SS amps that invariably drove them. OP, I think you have a sense of the difference, but nobody can tell you what you will like better; simply can't be done - it's up to you. Now I have heard both brands, and what I prefer to both is the Merlin VSMs, but that might not be up for consideration for you, don't know.