Hi all, I'm anctiously awaiting delivery of my new iMac, and I'm shopping for RAM to replace the existing 8GB that comes installed. My dad suggested: http://eshop.macsales.com/shop/memory/iMac/2012_27/DDR3L Is all RAM created equal? Is there a certain company or product that is more effective or less prone to problems than others? Scorching deals I'm not aware of? Thanks in advance!