Allow me please do disagree on the Power Consumption issue.

I would argue that it is an issue considering everything that we pack into our cockpits these days.

At 12V CN consumes 400mA, V2 300mA while Oudie 2 exactly because of a less power hungry LCD (which is not the same as in the V2) and a more modern processor takes between 200-220mA. That is full brightness, processor running at full speed. It's about half of CN and ~30% less than a V2. It means that it will run 2h 45min off its internal 1450mAh battery or if you like - it will give you almost 3 hours of navigation after everything else has failed in the cockpit (figures valid for Oudie 2's shipped after September 2012).

This is significant when you multiply this with as many hours as you will want to be airborne with all your electronic gear working flawlessly. While CN and V2 will easily consume most of a standard lead battery on a good flight you can connect a Nano (even over Bluetooth) to Oudie 2 and combined still consume less than the other two in this comparison. And get more value out of it (fully IGC approved logger file).

This is the reason why at Naviter we chose not to install an ancient power hungry GPS and processor into Oudie 2 but rather pack all the interface cables you will ever need to connect to a better data source right into the box.