Re: I dunno about the 280..
Most reviewers state that the GTX 280 is just overpriced for the performance it delivers. You can get 2 8800 GTs for a little over $300 that can approach the performance of the GTX 280 in Crysis.
Core i7 2600 @ 3.7GHz
EVGA GeForce GTX 780 Superclocked 941 MHz
1TB Seagate HDD 7200 RPM 32MB Cache
16X BluRay-RW drive
Dell 30-inch U3014 monitor