Number one is my favourite for obvious reasons, but not just because of the, shall we say...nice render?
Liking the C4D's and good placement and colour choice.
Get rid of the scanlines, there is almost never a good place to use those.
Text should be simpler with no layer styles/effects on it, just keep it simple!
Same goes for all the other ones, the text should just be text, nothing else (at least for these kind of sigs).
I like the third one quite a bit as well but it's a bit empty, as was the first.
Good job, waiting for some more!