I have thought of Merrill at times. I've never actually seen a pair. At the moment, I've got a nice stash of Asics Sortie Magics (though I don't like the newer versions as much as the older ones,) Mizuno Wave Eikedens, Takumi Sens, and a Hanzo. I also have found the Saucony Killkenny cross country flat very useful and I believe that's still around. At my age I may have enough of a stash to last for the rest of my life, which is a simultaneously disturbing and comforting idea. But maybe I can outlast my stash and try some of your suggestions.