Currently still using CrashPlan and may stick with them as it looks like it will still be the best deal for me even having to go to their small business plan. I’ve tested and will be using Chronosync to backup all our “workstation” computers to our server, and then use CrashPlan to back up a bit over 3TB of the server. If I have trouble with this I’ll switch to Arq + B2.
I’ve got another “cloud” – a safe deposit box at my bank. Alternate backups of my server computer and clones of the boot drives are in the safe.