Choosing a model - Tabular vs. Multidimensional

Understand the limitations of the Tabular model and when Multidimensional model implementation is more appropriate.

It isn't as simple as Distinct Count = Tabular, Parent-Child = Multidimensional...
http://msdn.microsoft.com/en-us/library/hh994774.aspx
http://msdn.microsoft.com/en-us/library/hh212940.aspx

If you're still using Office 2007 or SQL 2008 R2, it might be a bit easier to make a choice...