I need to choose a GPU (architecture based programs)

I need a gpu based on list of programs and I need to know which brand is going to work better, AMD or Nvidia.

photoshop, autocad 2013, rhino 4.0, revit 2013, lumion 3.2 

price range in between 200-250 and i'm considering something between r9 270 and 760

*edit* it would be preferable if the recommendation had a list stating which gpu would work best with which program


photoshop - nvidia

autocad - amd 

rhino - nvidia 

revit - amd

lumion - amd

or something of the like

AMD 270x