For entries #35 and #37 we feel like you completely understood each aspect of what we were looking for. The colors are great, the ".it" is less prominent. There is a hint at filtering but its hard to tell that it is blocking out bad things. Could we play with it a little more with the icons to try and give the impression that you are filtering out unwanted traffic somehow?
#50 and #49 do not strike us as appealing as the other two.