I am glad you like the designs. #170 Its very good balanced, its Masculine and very sporty, its simple and very ease to remember, it will look good from a size for a pen to a billboard. Its modern and i think every age range will like it. #172 #175 is also also very interesting, simple and easy to remember and can be printed without problems, but the difference from #170 is that this ones shape is more rounded, so it looks more like a motion. In my opinion i think both are great, so if you have any questions or anything you want me to change please let me know.