Enterprise Vault Archiving in the cloud

I just wanted to get a quick idea of other people's experience of using cloud based storage for EV.

We currently have EV10.0.4 CHF3 and approximate 7TB of archive storage (we don't delete anything - ever)

The amount of space on the SAN is getting tight, and i'm considering spooling the data that is 10+ years old to the cloud.

I suppose my question is which cloud should we use?

Could someone share their experiences/pricing and any "gotcha's" in doing this?

Thanks