Alternate RT Logo treatment

Exploring marks and colors for a redesign tonight. I'm looking for input in a couple of areas. 1). Your preference of the three, and 2). familiarity... I feel like I've seen a mark like this somewhere. I just can place it.

I'm all for borrowing inspiration, but don't want to hit anything too close to home.

And yes... I know the little thought/speech bubble concept is way over-used.

Thanks in advance for any insight you can lend.

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