@Neo

I did a lot a test in that area too, but I give up :)
The solidworks wall thickness looks amazing Oo

@WillBellJr

Normals map and diplace are really different.

You can 'bake' an high res model over a lowres one. N-gones should not be a problem, but I never tried that.

You can use a software like x-normal (http://www.xnormal.net/1.aspx), where you can import a low res object, an hires one, and transfer the details as a normal map.
However, I'm not sure if x-normal will load the MoI .obj with the right vertex normals info. If not, then the result will be really bad.

More less every 3d package can do this normal transfer now, the only problem is to import the high-res model. (x-normal is really optimized to import huge highres models).

For the displacement it's an other story, because your base mesh has to be ready to be subdivided with a clarmull-clark kind algo. So you really have to prepare this base mesh carefully (-> sds/poly modeler).

You can for example use 3dcoat for this job too, importing your huge moi mesh, rebuild a new base one with the retopology tools, and then bake the details has displacement map.