I reckon The middle one is a suitable one for the Clan Emblem. 'Coz when in TDMs or thoe type of games you can clearly see the emblem. At the same time it kinda feels simple for me and even though it may be basic but it brings such a huge emphasize and impact.
I like the first one more tho. Feels flashy and looks cool. xD hehehe
The last one, i've seen some clans with a similarity like that. The eye thingy. Nonetheless its a great art and design from you Rockey.
Finally, you worth more than a praise but. Well Done Rockey.