Thanks for all the suggestions and input folks, especially mgeoffriau That's exactly why I was afraid of going with anything that had an injector in it.

Possibly against all your better judgement, I went with the one below. My logic is that it is fairly simple so it should have staying power, while just being stylized enough that you could recognize it even if you didn't read the words. Also, I like it, so screw all y'all