ill step up for carrara and ampapi, carrarar is great for renders and and such but the main reason eovia push amapi as the modeller is its ease of use, its much faster to model in amapi the interface is very easy and user friendly and although a bit buggy its a very powerful modeler with some very powerful tools inc nurbs and subdivision. its particularly suited to organic modelling. as the pic shows. not to say that the others mentioned arnt any good, i guess it comes down to what works for you as an individual. ive heard many complaints against Truespace being difficult to get to grips with but i found it very easy to model in just not my favorite for organics. stu