I have a 24" early 2009 iMac. I haven't been able to find out much about changing out the 2.66GHz Duo for a 2.0 Quad (SLGEJ). A 2.16 or 2.53 would be okay with me too. I have done research and they have the same Peryn core. Has anyone tried this before. Taking apart the computer is not an issue. I've replaced the HDD twice and stripped down a MBP. I don't mind a little bit of work. I'm okay with not exactly plug and play.