Proxmox
- could be middle ground. Vmware ESX is able pass through too, if you are already use it for work its nice to go.
- other is virt-manager (GUI) - but its quite limited its not working for me, i was able to pass through gpu to virtua,l install driver (after reboot all is right from windows perspective card is there) but still not picture.. there is quite chance that problem is not virt manager, but other stuff..