I personally use Blender and love it. It is just going through a bit of an overhaul to version 2.5, but version 2.49b is perfectly production ready (although the interface in 2.49 is not very beginner friendly, but the community is very helpful with lots of tutorials). I've never tried wings3d or cheetah3d, but I have heard good things of both although wings3d is mainly for modelling (It looks like it has limited texturing tools). I would suggest Blender (cross platform) or Cheetah3D (OsX) so that you have a more rounded tool that will not limit you.
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