I'm getting my first Mac since the IIs . Since the IIs I've been on Windows machines and I can't take them anymore. I spend more time troubleshooting the machine than I do using it. I'm very excited to have a 27" 3.4Ghz i7 iMac on the way (and a bit worried about the screen blotch issue). My question is: can anyone recommend an EHD for use as the Timemachine backup? My machine is coming with a 1TB internal HDD. I'm looking for quality and a good value. Thanks!