The border should also have a solid background in its inner part. The hover looks almost the same as currently in the Media. And I'm not sure if the cross is good. Well, for a cross it's great.

But I'm not sure if a cross should show the disabled state. In the current svn Media I have a dark gray overlay for disabled (the classical "grey out effect").
Here are the current buttons and counter icons in the svn (the ones for 0.4.7). Basic, hover, disabled, clicked, quarters, dojo, forge, treasury, host, quit, cannon.