Digifly Cartesio BT
We have looked at a few different varios but for
the moment we seem to be happy with this.

The ability to link with the GPS, 3 altimeters and
with the added software which can then send the
waypoints to your PC and then link with Google
Earth and overlay your track onto it in 3D
definatley made this one of the top choices.

Of course there are still some more to try but in
the mean time this will do.