Hello All, I have an iMac Core Duo 2006 (the first intel mac) I want to upgrade the wifi so that it will work with my time capsule (1st gen) 5ghz wifi network. I was looking and there appears to be 2 options 1. Airport Extreme Card Model MA688Z/B 2. Airport Extreme Card Model BCM94321MC Which of these will work ? and which is best ? All advice very appreciated. At the same time i will also be upgrading the HDD to 640GB Samsung Spingpoint F1.