like the second one down, maybe get rid of the black oval shape at the bottom just below the bottom of the pointer and move circle of rev pointer down. Also prefer coopers text from the first logo you did with black border white fill, stands out a bit more getting v close, pm me if that doesn't make sense, hard to explain surenther - i will wait
thanks for your entry i didn't like the logo, the header looks nice though Ariestoteles will probably win, very good designs, contest will close within 24 hrs