Updating my quad core

I am looking at updating the vid card in my quad core... is the GeForce 8800 with 512 ram still the best upgrade option?

 

I will mostly be using it for WoW.... so i guess the best gaming card.... is what i am looking for opions on..

 

yeah and WoW works great on the current set up but I am also upgrading the ram and adding some more hard drives so I figured I would double the ram on the video card as well.. I don't use the pro that much since i mostly game on the laptop but i finally put the machine in a convient location hence the upgrading it..