Hello, I have decided to upgrade the memory of mac mini server 2011. The cheaper option is to just buy 2x4GB@1333Mhz. I am thinking if it worth to buy 2x4GB@1866 which is not supported by the cpu but it seems to increase the performance for apps and graphics. The most expensive option is to buy 2x8GB but the cost it way too much. Do you think prices will drop soon and better wait to upgrade to 16GB ?