On #8: I like the idea of the ring around the bars but is there something else you could do with out the bars? Maybe a reflection of the "O", ring around, above, or below the word "OPIS".
Entry #163 is a bolder serif font that I hope you like. I also thickened the oval "O" to better balance with the strength of the new font. I'll look at some other options, too. This one immediately seemed to convey strength to me. I look forward to your comments.