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I actually like the first design as i feel that would translate well onto any media, be it digital or print. You could also potentially use different colors without drastically affecting the brand identity. Its clean and that makes it versatile at a lot of different sizes and purposes. What i would like to suggest is adding the spark from 4 and integrating it into 1 but maintaining the clean look minus the gloss. In my opinion this would allow you to keep the logo versatile.
