Hello Max,
I would prefer to stay away from Lettermark so #14, #13 and & 12 is a big nono. The only one up to now is #11 that might some potential:
1) colors are too cold, try something warmer (lime green)
2) Have the K Be smaller so it doesn't extend out of the border of the "D" and make it thicker
3) make the edges and lines slightly "lively"
4) Add antennas to the D
5) "digital krikits" should be one color, lighter grey
Thanks!