The black text on the Chillarmy one needs working. The rest of the banner is fine other than a couple of niggles. The text is rather too small and could easily not be there. So if you we're to make it larger, then everyone could see a little better. But as it's black, it really blares out from signature, so you'd need a slightly different colour, like a dark grey or dark blue.
The other problem is that Chillarmy doesn't suit the background. It's a forest, if I'm correct and the colours are too bright to show much anyway. Those dots of colour could go too. But that one's mainly my opinion, so it doesn't matter.