I think i need a memory upgrade. I run CS5.5 and some other design applications up to 4 or 5 open at a time, and I get the Rainbow wheel a HECK of a lot. I have one of the new iMac's that were released on May 4th or whatever. It's the base model 27"er. Would upgrading from 4 to 16GB of RAM help much? I think i'm gonna get that 4x4B package from Other World Computing for like $160. Well worth it if it clears up the rainbow ring problem. I never thought this quad-core computer would rainbow wheel more than my early 2008 MBP. Any suggestions?