Hey guys, I'm thinking of upgrading my RAM, because the standard 4GB just isn't cutting it for me. If I recall, the Quad-Core 27" iMac's from late 2009 have 2x2GB of 1066 RAM. What do you guys think my best option is? Just buying 2 more sticks of 2x2GB of 1066 RAM, or is it worth buying 8GB in all new, 1333mhz RAM? Or else, should I be talking an entirely different approach? The last bit of advice, would be the best place to buy the RAM (I hear newegg is one of the best, but I could be wrong). Thanks!