Do Macs have a "1/8 inch stereo line output"? I want to purchase the Monsoon mm-702 speakers, but I only know the im/mm 700s to be compatible with Macs. The requirement for the 702s is this "1/8 inch stereo line output." Does anyone know 702s would work on a Mac or would anyone like to steer me towards a better 2.1 Speaker system? On the side, how important is "magnetic shielding"? I am wondering b/c I am also interested in the Creative Labs: iTrigue L3450 speakers, which do not have shielding.