As for me, I like number 7. But they are a little bit not professional. You know, logos should be very short. For example, Nike logo. When you heard this logo, you can easily remember it in the future.
for me (personal opinion,DO NOT BE ANGRY . its tooo ordinary. seem like junk template. try find expert logo at deviantart. his name is "Doralpol" (I do not know him, but I've seen his work). more more and more better than that. ....one word : "AWESOME"
Hello. I had a chance to look on the site and I want to tell you that among all the choices I like number 7 the most. So, I like it very much. And I would recommend you to choose it.