Monitoring Active Directory on a Windows 2008 Domain Controller

I currently use Server Performance Advisor (SPA) along with a couple of other tools on my Windows 2003 Domain Controllers to monitor Active Directory health. We will be moving to Windows 2008 Domain Controllers in the near future. I was wondering if anyone has used the Performance and Reliability Monitor (PRM) and how it compares with SPA for monitoring Active Directory health. SPA provides good reports on System Health and LDAP requests but requries .Net 1.1.4322.

We had Microsoft in a year or so ago to do a Health Check on our ACtive Directory and it was really useful. They left us a tool called Active Directory Snapshot Tool which has been invaluable as it brings together all the scripts you would need to confirm AD Health. I also run a series of Performance Counters taken from SPA to provide me with a baseline. I am curious if anyone knows if SPA is no longer being used on Windows 2008 Domain Controllers.