Wow - lots of good entries. Ok
#5 and #3 are a near tie. While I like #3,
#5 seems to portray more intelligence - very creative.
#2 & #1 are good, but the "Of" gets lost in the split color. It would be interesting to see the "Of" be easier to read.
#4 is good too, but too wild west. It doesn't quite fit.
Great job on all of them... very creative.