I own the poster version ("The Art of Atari, the poster collection") and it's great. I have three of their posters hanging in my office right now. It's not just nostalgia, the art is terrific.

EDIT: the poster collection now costs $600+ on Amazon. Wow.

Aargh. I've been wanting a large poster of Missile Command for a while now, but can't seem to find one at a decent price. Having one printed is difficult too as I can't find high-res, large image files of it.