I like #176, but #171 is clever on so many levels. I see an "O" and a "G". It looks like an eye. It looks like keyhole. It also looks like the top of a capitol rotunda, either looking down from the sky or up from the inside. It also reminds me of a "power on" button. I also see a magnifying glass.
The font choice is outstanding. However, the logo needs to be refined. I am not sure exactly what needs to be done, but this has a ton of potential.
Thinking more about #171...
Consider the weight and relative size of the logo and its two components. If you do too much to it, you may ruin it. I wish I could offer more direction, but I will know it when I see it.
Thanks for appreciating the concept. I am glad that you got the concept behind our approach. The main aim was to keep it minimal and also potray everything that our brand means. Hope my new submissions carry that forward.