In #17 and #18 I continue to like your clean minimalist approach. The main lowercase font seems a bit conservative yet but I like the slogan typeface. I'm not sure about the use of the initials. I think I need to sit with this a little while.
#45 I guess I takle it back, the wave highlight does work a little better than plain. I prefer the black lettering over the gray.
#46 I like the 3d separation in the letterform. The typeface for the main protion isn't quite working for me. Perhaps some variations on the font here?