Hello, I have a mid 2010 iMac. I am very happy with it. Mountain Lion is fast and smooth and is everything I need. I am going to change my DSLR camera so I think that iMac will welcome a RAM upgrade. Where can I get it? Any model or brand recommended? I think that 4 GB will be enough but I don't mind install 16GB if it's much expensive. What about SSD? It's possible to install in a 2010 iMac? I also have read that iMac needs the hard drive replacement for the defective Seagate hard disk...I am a bit scared about that.