I definitely think the idea of a "Best of the Best Library", along with a full list elsewhere of Ages that pass the basic minimal criteria, would be great.
All publicly available Age should pass basic tests, a task I fully expect the Maintainers to do very well at (and a task to which a larger group or loose community gathering would be less well-suited). I don't want to link to an Age that is going to crash me out on link-in, or even be potentially damaging to my local system. There's generally a well-defined line between judging an Age's fitness for use, and judging its creative content in anyway other than the most clinical. I have faith in our community, and particularly the Maintainers, will be able to do that in a way that serves the community.