That's a hard one.
I honestly prefer Mw2, but Black Ops has Nazi Zombies and Combat Training, which are really cool features.
Thats really tough because it seems like everyone likes MW2, but I think that Blops is a lot easier. The least expensive would be MW2. Also depends how into sniping you are because MW2 has a bigger sniper community.
I think I am going to go with Black Ops due to the zombies.
Buy Blackops Dude I voted for it!
Go for MW2 its better and has a better storlyline IMO.
Black Ops all the way
Both are Epic games but there are more players in BO. Also it has the zombies and Combat training which is useful(Combat training) and fun(Combat training and zombies). But if want a COD game. Wait and buy CALL OF DUTY: MODERN WARFARE 3 XD
MW2 IMO is sooo much better for online gameplay, i love sniping in it
I got Black Ops. I am already a 1st Prestige level 41