I have just purchased a refurb 27" iMac 2011 it will be replacing my 21" 2009 iMac,i have photos and music on the 21" which i want on the 27",what is the best way firewire or ethernet,i have an ethernet cable but have been reading about firewire and there are so many different ones,which do i need is it 6pin or 9 pin,i did see in system profiler on the 21" that the firewire speed is up to 800 so what do i look for.