I like the idea of the shipping tonnes of 5GH mars system, to boost the robustness of the network - however BFL has already got 5GH working prototype - so it's a bit neither here nor there.
Would be better to focus on 250GH machine and deliver it quicker.
Yea, feels kind of silly, taking delivery times into account, to buy mars only to send it back after 2-3 months (unless someone plans to stick with it).