I like #21, however it's a little too squarish. Can you maybe round out the edges of where the lines end. No need to round out the edges of the C. Also, the symbol is too close to the writing.
We really like #53. Now we just want to see it with different fonts and different colors. As for the colors, we are still not really sold on the orange you chose. Can you give us stronger shades of orange? Also, can you give us versions of the logo without the shading in the colors, just solid colors? Thanks!