The customer likes the font of #64 that feel secure, she also like the s symbol, she is not a big fan of thoses shield shapes, the discreet swiss cross is so discreet that it become usless because it is not printable. So get a rid of it please. I think workin on the S symbol in orange and blue with this font is your best chance, Thanks
#153 and #154 are interesting but dont need the signal thing nor the mercedes benz wink... I have to say that on this idea I am not disturbed by the shield shape because it is abstract and subtle, will wait customer feedback to see if we can make it rank.