Good afternoon, so work decided to provide me with a budget for a computer, and because we are affiliated with dell, we got corporate rates and an "allowance" to buy one, so I bought an Alienware Aurora R5? With the following specs, and I want to know if this will last me for 3-4 years with minor upgrades, I mainly play WoW, SC2 and Dota, perhaps moderately more graphical games in the near future

8GB Quad Channel Ram, 1600mhz
GTX 780 3GB RAM
I7 4820K
SLI Capable MOBO (I think Alienware Brand)
Watercooled CPU