Ya know, you can make a case for any one of them. They'll all work and they'll all suck equally. It's all personal preference.
Most sign people can stand on either side of the fence and either rip something apart or build it up for different reasons.
With the bottom one, I think if you gave all your copy the same slant, it would improve that one greatly. I also agree, the bullet points are a little weak, I'd eliminate them.
The others with white bottoms will get dirty rather quickly and also make the bottom kinda disappear which is weird.
So, I still like the bottom one so far.