Hi, I came across a posting that you can add eSata to your imac. I understand that I can send it out to OWC and pay a fee to have them install the esata but I can not afford or have the time to ship out my imac. Since I have a 2009 late iMac 27inch model I think I need to get a PCI/express card to additional esata ports. Do I have to forfeit my wifi card and replace it with a esata port? I am not using the wifi on the imac so I can remove that if it's necessary. If this is the case, what PCI express sata card should I buy and what cable do I need to run from the inside of my iMac to my external hard drive? Thanks!