Hi, I was thinking of purchasing a used Mac mini off eBay for my entertainment center (1.66 GHz Core Duo, 1GB RAM) with intentions to upgrade it. When I looked it up on everymac, I noticed the maximum amount of RAM was 2GB, which is sufficient for now but I would like 4GB in the future. I was wondering, what determines the maximum amount of RAM for this computer? Is it the logic board or the processor? If I were to upgrade the processor to a t7200 (which I am seriously considering), would the RAM maximum be raised to 4GB or stay? And finally, would it be capable after being upgraded to run Lion? I know this is a lot to ask but any help is appreciated. Thanks in advance, Chris.