Hi all, I've been contemplating upgrading my iMac 27" Late 2009 from it's current 4TB which I upgraded 3 years back. I have narrowed down to 2 :- 1) Hitachi HGST Ultrastar HE8 8TB costing approx $600-650 2) Seagate Archive 8TB for approx $275-300 As the name in #2 suggests, since it's archive its performance is lower. I'm wondering if an old iMac like mine would benefit from the performance of the HGST to warrant double the price or would it be a waste. The fact I'm considering it means my budget would cover the HGST however if I'm not going to benefit from it 'cos the iMac 2009 is too old, then I may as well go for the Seagate Archive. Any recommendations? TIA.