its improtant to not too that in alot of productions there are often several of the same model in higher and lower res versions I think the polys verses nurbs thing has alot to do with the modeler too! sometimes its just a matter of which is the easiest or most comfortable to use, they both have advantages and i think you can achieve mesurable results with each, though most of my friends that work at some of the biggers studios seem to think nurbs are dead (digital domain, imageworks some of the crew at nickelodean and the mill ) also a reason you see so many using in house software