I like #28 the most out of your entries, so let's build on that one...
I like the shape of the icon because it is like a shield that means protection. Can you try to make the 3 S symbol inside the icon a little more rounded? I don't think it resembles an S enough. Also, I like the combination of Blue, Silver, and White. Can you try to throw some color into the name instead of just Black?
#69 is very interesting. I don't like the font very much, maybe look at ESPN logo for a cool font idea. Also, Could you make the color scheme with Blue, Gray/Silver, and White?
#80 is the best so far. Put the Grey "S" in between the Blue and the Green. Make the Green a little darker. Get rid of the slogan under the company name.