Which Agent for Virtual Servers

Hi all

Just joined the forum as I'm about to purchase Symantec Backup Exec and I was told I need to also purchase an agent that will backup the two virtual servers that will be running across two DL380 servers.

I have two questions that I hope you guys or girls can help me with:

1) What agent do I need to purchase for Symantec Backup Exec 2014 that will backup the two virtual servers that I will have?

2) One of those virtual servers will be hosting the backup server.  I have heard mixed opinions regarding having the backup server on a virtual machine.  Do you think I should ideally purchase another physical server soley for back purposes?  Seems a waste of $$ and my budget it tight.

Thanks for any feedback and help.