I have an early 2008 3.06 ghz 4Gb Ram 24" that is working just fine. Although I am interested in upgrading soon to the 27" 2011 or waiting for the '12, I notice that what i have can be upgraded to 6gb Ram by simply adding a 1x4gb chip into one of the slots. I don't do games or video or photo editing. Just movie streaming, email, surfing etc. Some basic GarageBand and other music mixing and recording. 1. Will the added 2gb make a difference in the 2008's performance? 2. Will getting a 2011 or '12 with similar Ghz and at least 8gb Ram make a difference over the 2008's performance?