I'm interested to hear people's plans for how they intend to back up the data on their new iMacs when they eventually arrive. If the price is not too high I will probably get the fusion drive with 3TB, how would you recommend me to back this up? I'm not considering Apple's time machine because it seems way too expensive so this is where I see my options. I can buy a 2TB external hard drive for around £65 but the cheapest 3TB is about £120. I may as well get two 2TB drives for roughly the same price as a single 3TB one, but if I was to do that I'll never be able to use the time machine function effectively will I? What would you guys recommend, and tell me what your plans are?