3d software

I have read through a few of the other posts about 3d software but need some further assistance.

i need a 3d package that can make 3d models to scale whilst render adequately, I am currently using rhino 2 which is ok but basic.

However I also use flash mx 2k and would like to use some 3d in my sites and animations. I am not likely to do fantasy type animation or models, mainly just product design.

Any recommendations on software, lightwave, max, maya or others, xsi seems a bit like over kill?
:puzzle: