i would say that the 4890 will play any game, no matter what. and is kinda over kill.
the 1200 is a fantastic case, mine holds everything and then some.
my original heat sink and fan have since been replaced with a Cooler Master v8 and i still have macho room.
it also has great places to hide wires.
cell picture, but shows the newish v8 cooler, and how much room it has inside still.
but the tower is rather large, but if thats not a con to you, all the better.
to put the case size in perspective, that monitor is 22in and the Vizio is 37in.