Thanks for the feedback. I am glad you like my concept. Here are two new ones with "R"s in the vertical box. Both in the grey and white, please let me know if you'd like to see a color in the logo.
#146 and #147 are the same logo that you have ranked in 2nd place except that I have used 2 alternate fonts for "Riverstone". I really like the feel of the font in #147, hope you do to.