Nikola Matošević - NM monogram

Was about time to refresh my personal monogram a little or at least to edit the type used for my name and surname. I'm still not sure which works the best so I need your help :) I really like my monogram surrounded by a circle, although the simplicity in the versions without the circle draws also my attention.
Should I go thin or bold, circle or no-circle?
What do you think, which one looks the best and why? Looking forward to your feedbacks!
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