I'm looking to buy a laptop. Specifically the HP dv6z-7000. http://shopping.hp.com/en_US/home-office/-/products/Lap... . It has an amd a6 and a HD 7600. I'm willing to spend an extra $50 on customizing it. I could either get the upgrade to the A8 or the upgrade to the HD 7670m. I'm looking to use it for very light gaming and more of an editing machine, along with video watching and internet browsing. Which one should I upgrade to? Thanks in advance!