Greetings, I just ordered my new iMac 27" with i7 quad core. I'll be using it for CS5 Premiere Pro and CS5 After Effects. I'll be working with AVCHD video footage from my Canon HFS20 (It can record movie at 24mb/sec full HD 1920x1080p / 24fps). Anyone try putting 16GB of RAM into their system? I wonder what the performance difference is. The stock iMac comes with 2x2GB RAM sticks leaving 2 slots open. So it is a no brainer to order 2x4GB RAM sticks 3rd party...However, what about 4x4GB RAM sticks. What we are talking about is the difference between 12GB of RAM and 16GB of RAM. Has anyone tried this? I haven't received my iMac yet (Apple says it will ship Aug. 24), but I will order the RAM shortly so they arrive at the same time. I am in Korea and a Samsung 4GB RAM is about 140,000 KRW, which is roughly $120 USD.