I should have said, I have posted on this subject to centos-virt. There were some useful suggestions for resolving issues with KVM configuration. Regarding what version of the RPM should reside in which repository, I was advised to post on this list.

Karanbir Singh wrote:

Julian Price wrote:

What needs to happen to get KVM-72 or later into a repository?


talking to the people actually using kvm and centos on the centos-virt 
list would be a good place to start.