I really like #48. Can you show me this without the logo to the left? Maybe just the words (font) as the logo? Perhaps the font would need to be a little bigger if we remove the logo, maybe not. I would like to see it both ways. Looks really nice. Strongly considering this. If you have any other abstract symbols you can use to the left, I would love to see it as well.
#41 is nice as well, but I like the font better in #48.