Enterprise Backup Solution integration with RHEV or RHEV Manager

We are investigating a tightly-coupled backup integration with RHEV and RHEV Manager.  We would like to have better options than simply backing each VM up as client.

What are you folks using?

Was it highly customized?

Are you pleased with the current (Jan 2013) ISV support of the backup product and RHEV?

I know that Acronis is a strong Red Hat partner and I am starting to find some documentation from Symantec indicating support for Netbackup with RHEV.  I am hoping to see something from Tivoli, Commvault, Symantec in addition to the great products that Acronis utilizes.

Thanks!