I've seen latest comment about your preferences, but still wanted to offer something more contemporary and pro-looking! This design and all its variations (#77, #78, #79), has that unique crossword layout, with word "STACK" actually stacked, which contributes to its recognizablity/memorability.,...from branding point of view, this might make big difference in relation to your competition. Also, you can remove tagline "the productivity pro" and still have very recognizable graphic mark.
There are three variations,...basic (#77), with just words, than entry #78, with more abstract clock representation in letter "C" and entry #79, with more obvious clock segment! My suggestion would be entry #78!
Hope you'll like this modern design approach, and if you have any suggestions for improvement, feel free to let me know! Thank you!
...two more options on #80 and #82! I've used two color combo, for cheeper printong, but if you like the concept, we can try introducing some gold as well! Thanks!
I have few more potentialy interesting updates on these designs, but can't upload it at this stage of the contest, unless you move one of my entries into top 5 ranked group!