Hi grafikus,
We really like design #5 and are curious to see some tweaks. Is there a way you could incorporate compost (dirt) in #5? Maybe take the image of the sun out? For some reason, it makes us think of a crop company or something like that.
We like design #3 too! Could you incorporate the compost cycle more? Right now, it looks a bit industrial. Maybe incorporate how by composting you're participating in a process that looks like this:
http://www.cornerfarm.org/wp-content/uploads/2013/02/compost_cycle.jpgThank you!!