Hey guys, I have two sets of speakers, one is a 2.1 and the other is just two speakers. I would like to create a surround sound setup, but I have no means of doing that with only my late 2008 unibody macbook pro. I was looking at the Creative X-Fi Surround 5.1, but I am not sure as to whether or not it is mac compatible. If so could you recommend any other usb external 5.1 cards? Thanks!!