Hi shunki,
I'd like to go with
#41. It has been my experience, as a graphic designer, the simpler the image - the better.
A logo needs to be memorable as well as reproducible at different sizes.
Any of the logos in this contest that is using "stitching" or "twisted thread" will fill in or block up when reduced in size, thus defeating the purpose of the detail. Both for web and in print, and may need to be printed in Black & White.
They won't just be seen as the size displayed that you see them here on Logotournament.
This is why I chose for a solid button and the wide, solid buttonhole as it retains its detail and is still recogniseable.
I hope this helps in your decision.
regards,
Lawrie