Hello With Lion out, I am tempted to upgrade the RAM, so I would get 2 licences of Lion, however I know my Imac 2006 can handle it with 3GB of RAM instead of 1GB? I am wondering where is the best place to get this ram upgrade? I live in the UK. Can I get 2GB RAM and keep 1 of the 512MB of RAM? So I will have 2.5GB RAM? or is that not going to work. Btw, I have the 17" model, 2GHz if that helps.