i see hosting of cex.io end after 1 month
Where you get that piece of info, cex.io is quite trusted and have already sold 40million $ worth of bitcoin with credit card. I think you can choose them between two site you listed. I have never used their service but you can check review about them and proceed if you feel safe.
Cex.io is old I remember their pool was almost reaching 50% and they took action. But after their ghash market felt down they lost a lot of customers. They still do seem trusthworthy but I would not use either of the exchanges you mentioned...
