900$

I want to buy a new laptop for gaming under 900USD Please tell what specs would be good enough to play games for future 3~4 years

My Specs are MotherBoard: EVGA X58 SLI LE 141-BL-E757-TR [240$ Originally] Graphics Card: MSI N460GTX Hawk GeForce GTX 460 [241$ Originally] Ram: Mushkin Enhanced Silverline 6GB DDR3 SDRAM DDR3 1333 [46$ Originally] CPU: I7 920 3.36 Ghz (Dummy O.CED) [280$ Originally] Cooler: CoolerMaster...