These are nice designs. I like the direction you are thinking. Keeping subtle is good. I don't like the red as much and the fancy "B" is not my favorite for our firm. Tell me more about what the image in #8 represents.
I like the symbol in 15-20. However, I am not exactly sure what it is. I don't really care for the "BWM" letters. The colors are good. Could you make the design a little more simple?