Which card should I get?

Alright, so I don't know which card to get. I'm deciding between the MSI N680GTX Lightning and the MSI R7970 Lightning.

MSI N680GTX Lighning: http://www.newegg.com/Product/Product.aspx?Item=N82E16814127693

MSI R7970 Lightning: http://www.newegg.com/Product/Product.aspx?Item=N82E16814127670

I plan on playing these games (long list, please bear with me):

Battlefield 3, The Witcher 2, Batman: Arkham Franchise, Skyrim, PlanetSide 2, Saints Row 3, Far Cry 3, Chivalry: Medieval Warfare, Sleeping Dogs, Tribes: Ascend, Hitman: Absolution, Arma 2/DayZ standalone (once it comes out), Metro 2033, Overgrowth (it's a cool game, look it up), and Blacklight: Retribution.

So, based on those games, which card of the above two do you think would handle these games better (overall)? I've got the money and am pretty set on these two cards, so I just want to know the better of the two.

Thanks,

Eamojoe