Well I got this working by doing the following
First made sure libvirt daemon is running
(use your favourite method to get this done at boot otherwise you will need to do it manually every reboot)
Then I followed #7 on this virt-manager bug
note:command 1 should be redundant, not sure if the symbolic link creation in command 4 did any good but I did it.
sudo apt-get install qemu-kvm-spice
sudo rm kvm
sudo ln -s qemu-system-x86_64-spice kvm
There were a couple of new errors but re?/installing kvm resolved them
sudo apt-get install kvm
All good to go. I perceive it as a bit slower than a virtualbox guest with the same hardware allowances, but nice to have the option.