I liked the way the circle around the "N" cut into the rest of the word "Nameplates" on #149.
I love the Blue used in #147. How about fading only the circle around the "N" from Grey to Blue starting from bottom right going to top left. Can you incorporate some sort of industry logo like an industrial plant outline with smoke stacks, etc. in the background? Maybe center slightly above the word "Nameplates"