Windows 2003 -- Active Directory "Group" report ?

I plan to trash my entire Windows 2003 AD
and create a brand new Windows 2012 AD since
lots has changed and I want to only bring
over the needed items for the 100 users.

 1. Has anyone else trashed an entire DC and rebuilt it ?
 2. How can see something like the below on ONE report ?

--------------------------------------------------------------

GROUP_AC1_RW
  John Doe
  Jane Doe
  Barb Smith

GROUP_AC1_RO
  John Smith
  Jane Smith
  Barb Doe

etc .......