I like logos 1 and 4. For 1, like the simplicity and the sleekness of the look.

Logo 4 has possibilities for converting into stickers, emblems etc.

You are right, it's hard to decide. If I have to really decide on one, I'd go for logo 1.

Sorry if I clicked on both logos in the poll. Accident.

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The nose runs and the feet smell - go figure
Steven