#6 is interesting, but the art is a bit confusing....try using different color combinations or font to differentiate the 1 and the W more, otherwise the purpose or concept isn't very clear
#7 is my first choice if we decide to go with just abstract art in the logo....but we are still thinking that thru
#28 is a great design, I would like to see the slogan added below the services . #24 and #25 are designs I like very much. I would like to see both designs with "construction " in the orangish color and have "one-way" in more of a blue color, the steel grey is great.