you have got first two places. Try to bring us a color differences - orange, black, shadows, without shadows and so on - :-) but it looks great so far :-)
Thank you for all your variations. We are probably going to stay with the golden spiral as is shown on 122 or 79. Please, here is the picture of the correct Golden ratio (there must be 6 elements). Find the right dimensions and use it :-)
Great but we are going to keep the shell motive, it looks the best. It means, try to please combine black and white background with color logo and black and white logo scheme. All with 173 and 176.