New gpu\cpu

[Edgar]

Hi I am planing to build a brand new PC. However I won't be able to buy everything by the time wildstar comes out. Which I would like to play without any lag on high settings. So I was wondering if it would be better for me to buy a new graphics card (gtx 780) or should I get motherboard,CPU and ram before the graphics card. My current specs are

Amd hd7850
Amd fx4170
8gb ram


And am planing on getting

Gtx 780
Intel i7 4770k
16gb ram