I like #66. Can we also look at some colour variations, fonts, proportions? navy/black/red/silver are important. Perhaps some glow? focus on the red 'out of the box' pixel?
#79 and #73 are very popular with the team - can we develop that a little? Could the red cube be a sphere? Something that makes it 'stand out from the crowd'? Probably lose the red dot above the letter 'I' Perhaps look to also link in the lettering into the graphic???
Also, can we loom at #107 in the same configuration as #48 and #137? #107 is getting a few votes in the office! We would also like to see a more refined/less dominating font like #48 and #137