Indeed the bottom 2 are very cool
I love how you came up with the idea of the M and the K
but i dunno how to say this in english so i hope u speak some dutch :P
the logo look a bit boring like a logo of a "begravenisondernemer" or something like that :P
u need maybe a bit of color to make it more outstanding.
Like 2 colors would be fine, than make the bg transparant like sir said :P and i think u got an awsome logo