Sorry to gravedig this 7-month old poll, but this is a topic that is being discussed again in some of the keyboard threads, so I thought maybe some people want to vote if they didn't already, or modify their vote based on some of the recent discussion.
I personally had "Meta", "Sym" and "Pyra" as acceptable choices, and "Pyra" as preferred one, but meanwhile I've changed my opinion: I now think "Pyra" is not a good name for the modifier, since it makes more sense to put the Pyra logo on "Super" (Windows logo key), and not have any key labeled "Pyra". So I changed my vote accordingly.