I’ve been around this market a little bit, used to do the big graphics show demo’s for Discreet, contracted all the big name manufacturing, architecture and design houses in Europe and many in the US and I’ve trained and taught, Maya, 3dsmax, Softimage, Studiotools and various parametric modellers.
The truth is, all these packages are the same, they are all very much of a muchness, one may have a slightly better render engine or wider availability of plugins than another, while another might have a better nurbs modeller or better export paths to cad/cam gear.
You can choose any of them.
However in my experience the easiest of these to use for importing data modelled elsewhere is Maya, and the easiest for rendering is 3dsmax, lightwave has the best soft modelling toolset and Rhino has the easiest to use Nurbs.
if all you intend doing is making 3d structures to render and superimpose into photographs then if someone else is paying Maya or Max would be my first options. If i was paying I’d make do with Lightwave.
Please bear in mind that very few hi-end studios use any package end to end, they will cad model in one, particle generate in another, animate somewhere else and the frig the entire thing visually by rendering with a renderman complaint render package that is controlled solely by a team of dedicated render programmers.
I have plenty of mates who still work at ILM, Cinesite, Rushes, Mill Film etc none of them know all of one package that’s not how the big studios do things.