Hi, I've haven't played WoW in a couple years, but am contemplating getting back into the gaming habit. Hence, I am looking for a nice pre-built gaming desktop to enjoy my experience on. Here's the catch, most of my funds for such a machine is tied up in Amazon Gift Card money. So I'm limited to purchasing from Amazon.com. Any suggestion, you lovely gamers!? Budget = $500 - $750 usd.