I find the black dots really distracting. I like the first one. You're dangerously close to over designing it, leave it alone
V5 is the best and i think the colours work well, you may want to shade some of the sides to give it more of a sheild look.
Yellow on yellow, red on red? think you need to think about this a little more and design so there is no colour clash. Puting a stroke around the type is not a good solution.