Hey guys, just curious as to when you buy your RAM from a separate website other than Apple, are you replacing the RAM that comes with the iMac as well or just buying the extra memory in addition to the RAM that is supplied. In other words, if you want 4GB, do you buy 4GB, or do you keep the 1GB w/ the iMac and just buy 3 additional GB. Sorry if this is confusing, but I heard that it is best to have all RAM matching so I was curious as to what I should do. One more thing, is this a good site to order from http://eshop.macsales.com/MyOWC/Upgrades.cfm?model=274&type=Memory&TI=0819&shoupgrds=Show+Upgrades ? Thanks in advance!