Depends on your preferences. I have always had better luck with nvidia cards/driver. They are not free from bugs but on higher end cards as shown by Tom's, the game play is smoother as well. GTX770 is a great looking card - I've had my eye on one as well. AMD does have a great price and included games. I would still hold-off until the new AMD cards are available to see what it does for pricing of all cards.
-Bruce