I am running Windows Server 2003 Standard Edition RTM on a domain server and on a database server. Eliminating any application issues from the discussion, should I be upgrading these systems to SP2 or to R2 and then SP2. What is the significance of R2? I am having no issues with my current implementation and I am hesitant to complicate things unless there are valid reasons to be on R2. What does R2 provide?