Need Help with what to replace Freenas 10 with

So my system specs are:
e3-1225v3
32GB ECC Ram
Dell T20 Chassis/Motherboard
4 Bay HotSwap Cage
LSI 9211-8i HBA in IT Mode
2 2TB Seagate Disks Mirrored ZFS
2 1TB WD Drives Mirrored ZFS
64g SSD MLC Drive for Boot

So my story is I was running Freenas 9.10 and using Iohyve for a few Ubuntu virtual Machines. I bought a 64gb SSD and installed Freenas 10. I was previously running 9.10 off flash drive which I still have preserved and could go back to it if need be. Had some minor issues with the UI and cant run smart tests from GUI ,it seems to hang the system. Have not tried to reset up my VMs because it just doesn't seem like its there yet and I was hoping for this to be my long term storage/VM box. Now I know that Freenas 10 is still in beta but it is supposedly 20 some odd days away from release so I figured it would be further along and more polished by now.
My question is can you guys help me choose a Linux distro that handles Docker/VM real well and ZFS support that you have personally used and or using now. I know most of them can do this but for some reason I am hung up on which one to go with. Thanks ahead of time for any suggestions/feedback.