You should make your own choice, because we really have too much icos right now, and almost all of them looks good, but not all will give you the money, so you need to be careful
To make this choice you need to read articles and forums, and invest that amount of money that you can lost
do not rush, and think twice before investing
In my own opinion - DMarket and Confideal - is a great projects. Take a look, do not invest now, just observe