I’ve practiced serial monogamy in this respect, but if I had the space, I’d buy another pair of speakers. I am now using Janszen hybrid electrostatics; the second pair would be monitors in the British tradition (Harbeth, Spendor, Stirling, Graham).
Come to think of it, I have a pair of Harbeth P3ESR in my second (desktop) system. I enjoy listening to them very much, but there is a special way that the main system -- with the Janszens in a quiet room -- can transport me.
I’ll be interested in what people say!