Replacement for Amazon Cloud Drive?

Amazon sent me an meail announcing that the sweet deal of unlimited storage for 59SUD is going to stop in less than a year now. So, my backup solution currently relying on ACD as a backup for my Synology RAID drive will have to be reviewed. Do you have ideas of what could be a good replacement?

• hubiC (from OVH) seems to be fairly good interms of price. But I have to investigate. Right now, I started using the 25GB free acount to test it.

Let me know if you have ideas I can add here.