Just pick a brand you like, and fit it.
I rode a K2 in the seventies, and with the upcoming of o-ring chains switched without any problems to that then new technique, using several brands like Tsubaki and D.I.D. I only know of problems with the 500/550 concerning space.
At the moment my only sohc4 bike is a cb400f, and i feel no need trying an o-ring chain on that, a normal chain exceeds 10k km without too much wear