yes, i prefer Indigo myself, I think its hands down the best renderer out there,but since it dosn't have an interface to speak of and relies on exporters to sent material info; at least for us non-coders; it seems Kerkythea would be the best best to use with MOI since it has a scene and material editor and can import various 3D formats straight from MOI.
That said if one wishes to export their MOI scene to another app. with Indigo support such as Blender, Max, Sketchup, C4D, Maya, Rhino, or SoftImage then by all means use Indigo with the appropriate exporter, as I said I think Indigo is the best renderer out there.