I'm about to pull the trigger on a RAID5 card for my MacPro (4x750GB) and I want an external (different building) RAID5 for network backups. I'm not quite in the market for a full >4TB RAID system as the price points still seem quite high. I was thinking of this system: http://www.amazon.com/Netgear-RNR4410-ReadyNAS-Gigabit-Rackmount/dp/B000Z2FVIE/ref=pd_sbs_e_4 Any thoughts? Would 4TB RAID5 be a good Time Machine back-up for my 3TB RAID5 MacPro in terms of space? Can anyone recommend a better system? We can afford to spend more, but I'm hesitant to pull the trigger on a ~$15k 16-drive RAID system. Part of my was thinking (hoping!) the Netgear system may support 2TB drives if they become available and that system would continue to support our needs for many years.