You've got some great options here, with #15 being the best, but still feels a bit too corporate and not luxurious/elegant enough yet.
#12 and #11 has something too... Simple and clean, but feels a bit light. Like it needs something above it. I'm wondering, what if there was a photo image of a diamond above it with the R and W engraved in it?
Very prolific and some great stuff here. Still needs something to make it shine. Rana likes the simplicity of #14, but the image isn't quite right. Would still like to see something with a diamond (see: http://openclipart.org/detail/168907/diamond-by-rapperklimov as an example) next to it and/or also as a part of #71.