#5 this is the closest to my original vision. All of the designs are quite good. One of my original design goals is to have a logo that will work both on a CD case, on a product, and on a web site.
#5 needs to be made more graphic, so that is is more recognizable at a bit further distance. Great design in the center as an adaptation of the caudelus.
Can you be more specific when you say "more graphic"... I went for clean, credible, medical, seal/crest type of vibe as you can see, I tried to work the type into the logomark itself for the very reason that its going to be put onto cd's, etc (would most likely require the overall design to be compact/portable across media)... Are you wanting the type pulled out of the logomark, or simply more visible/larger?