Rhinoceros 4.0 Serial Hi ;) I'm Learning 3D Drawing With Rhinoceros 4.0. Is It A Good Choice? What Other Software Do You Recommend?

Hi ;) I'm learning 3D drawing with Rhinoceros 4.0. Is it a good choice? What other software do you recommend? - rhinoceros 4.0 serial

http://www.sketchup.com/ Modeler is a free and good.
http://www.blender.org/ is a free, fantastic modeler animator who does everything, but the user interface a little getting used to.