Memory is cheap today. I suspect that prices will increase due to supply issues from Japan. I also might wait a year. I would like to see why the Sandybridge-EX processors have. I was also quite impressed with Intel's 3d transistor announcement today. Supposedly, this technology will be implemented in the Ivybridge 22nm shrink of Sandybridge. That's a 30%-50% increase in speed. Sweet.
My Core 2 Quad Q6600 still handles any daily tasks, even if it is slower than a i5-650.