So.. not that I could afford to do this. and it's probably stupid. but in theory. if the 27" imac has 2 thunderbolt ports and you can daisy chain 2 thunderbolt displays off one port could you then in face run 4 external displays off an imac giving you a total of 5 27" monitors?" (along with 12 extra USB ports, 4 extra fw800, and 4 extra LAN ports.........) someone in a shop please try this!