I have seen this one a lot too but I just have to agree, my pick is DeepOnion. This project is just very different from all the other privacy coins, first off you have the features that many other privacy coins just do not have. The system is ACTUALLY TOR integrated unlike many other privacy coins that say they are but actually are not. Then you have the splendid community that really wants the project to succeed and  does many things to try to achieve that. Lastly the developers are doing a great job with actually letting know what has been done, what still has to be done and what will be coming later on.

Overall quality project IMO.