File format for OpenGL

What is the best and easier file format to use with OpenGL.
For the moment, I use DirectX format (.x), but is there a better format to import in OpenGL ?
I have a Mac and I want to import other file than .x. Lightwave for Mac cannot make .x file.

Open GL is a low level API and does not support loading mesh files of any kind natively. However, you can find code to setup data structures, load files and execute renders on the net all over the place (.ASE or .3DS are quite common).

Can you give me an adresse to download a 3ds file importer un C++ ANSI?

Waiting for whatever to jump in with his spider3d plug!