mumul,
Thanks for your submissions. I like 58 a lot. In particular you've done a great job creating an interesting circle. I feel like it is a little too busy inside the circle, though. I like that you've tried including the ampersand inside the circle, but I'd like to see it adjusted so it isn't quite so congested inside. Also, can you try some where the J and M are separated? I like the concept of them being connected, but I feel like it's too easy to lose the J and have it just look like an over-stylized M.
57 doesn't really resonate with me as much. Let's focus on adaptations of 58 or anything new that you want to throw in.
Thanks,
Jason