Just to clarify, the Clarity DOES charge off a USB like the AV8OR, a single 1:250,000 chart costs just £25 (the full set of 8 is £125) and these come with airspace and airfield data included.
The Clarity's screen resolution is 800 x 480 pixels versus the AV8OR's 480 x 272 pixels.
Airbox will, in the near future, be adding a terrrain topo overlay which can be switched in favour of chart if the user wishes by choosing the appropriate option in the menu.
The Airbox Fast Plan desktop utility is nearing completion and this will enable full desktop flightplanning and the transfer of routes between PC and an Airbox unit. It will also check online automatically for the latest airspace, chart and software updates and download those accordingly.