So which 1900 one would we choose? For the moment ours isnt giving any problems in a 2007 macpro.

Does this mean we need to specify when we're buying one its for a 2007 or 2008 macpro?

Todd, is there a difference in running 2008 macpro with x1900 or 8800? Because you mentioned that you could get the TH2G running with the 8800, So why would we need the x1900 in the latest macpro's? Higher res or smoother playback on more layers?