I'm getting a new 2012 iMac soon (I'm sick of saying that, come on Apple!) and will likely have to connect it via wifi but have heard this can result in bad network performance for media files. I'd like other peoples experiences with this. Currently my G5PM has a Ethernet connection but it will be sharing the same room as the new iMac and it only has one Ethernet connection, my only other options would be to get a Ethernet hub in the room to share it. I have a LAN with shared media files on a PC in another room, plus of course the Internet connection. How good/bad is wifi networking on the iMac? Would I be better off getting the Ethernet hub?