I love Modern Warfare for its great weapons and class creation that maps are always fun as well. Black ops however has the better balanced multiplayer, the maps aren't as campable and a lot unique ways to kill, with more depth in options, the package was more complete with a better more intriguing campaign and I don't play zombies but its also great fun. Spec ops in MW2 is so so and i'd like to see something more unique a creative. I'm tied on which is better but looking at a selling stand point Black ops has the better value with Story, Zombies and a very deep MP.