Linking post

Hi,
Here’s my problem :

I have two custom post type : Artists and Expositions. Each has Title, Descriptions, Media, etc…

I want to link Artists and Expositions : Expositions could have multiple Artists, and Artists could have multiple Expositions.

It’s a king of advanced Taxonomy or using custom post type as taxonomy …

I’m thinking about create a “Artist” taxonomy but i’m think I will be limited. Because can’t create a Media Galery, etc ..

What is the best way to achieve that ?

Thanks a lot.