Which 3D engine

Hi all,
I have to create a little game with vb.net 2010.
Until now, I have used the functions of Directx 9, but i want to try a ready 3d engine.
I'm looking for a 3d engine with:
1 - integration with vb.net 2010
2 - dynamic skin mesh (I need to rotate in real time the joints)
3 - good documentation
4 - shadows
5 - it must be free!!

Which is for you the best 3d engine for my purpose?
I think the best i found is Ogre. What you think?

Thanks all!