I like all of these, but #65 the best. Something just looks off about it though. I think the line weights and sizes of everything need work, but it shows potential. Maybe try out various small color splashes of either red, orange or yellow. Thanks! It's basically a tie between the other three. Maybe some color will help me decide.
I think the representation of the C and S in #235 is very clever. Try making the graphic square in #235. I think it will look better, but may be wrong. As is, I think it could use some work. Thanks!