I see a tighter integration, where you modify the model in IronCAD, and it update in FEA in a reasonable mannor much like CAM?
Having Range FEA as the "engine" underneath IronCAD using the IronCAD UI and tools much like the renderer?
I think the choice is obvious, but really want to make sure and get feeback from the public. I'm no amazin crescin ( #$%^, that really shows my age).
BTW, Range has several FEA modules, and growing, something nice and new slated for mid to late May 2010.