Hi
Even that your opinion is the unique relevant... in my modest opinion #71 is the best and more equilibrated visually and with more impact
Also I added #75 with gradient background... #76 using gradient colors instead plain colors and #77 with just one color just to show you that the color works perfectly with also just one color or very colorful... also perfect for other media like tv ads, web, vinyl, stationery...
Bests Regards
fermat