Hi guys, I want to add a Airport Extreme card to my first generation (2006) Mac Pro. My serial number is G86380EKUPZ. Which Model #/Part # card would I need and where can I find them? I called my local Apple store and they told me that they could install it for me but they aren't allowed to order the part...? Weird. Also, while I'm asking, I'm interested in upgrading my graphics card. I read somewhere that the ATI Radeon HD 3870 will work. Is there anything else you guys could recommend? I'm gonna be working in Final Cut Pro, After Effects, Photoshop, etc. Thanks for your help!