I looked many places but still have no satisfy answers yet. Since the graphic capacity of high end 21.5-inch iMac is just same as that of the standard 27 inch iMac for the models of 2011, here my question is how to connect two external displays (not mirror way) through the single thunderbolt port on 21.5 inch iMac. The two external displays are 24" (1080p) identical, with both DVI and VGA ports. Anyone has succeeded such connections on 21.5-inch iMac? and what's the best solution on this at the moment?