I have a Garmin but I'm sure the mounting options are similar.
I use a suction mount with an arm that moves up and down. The centre of the suction mount goes exactly in the top left hand corner of your photo, with the arm pointing down in roughly the 4 o'clock position so that the sat nav doesn't completely block the glovebox opening or the speedo.
-easy access to power
-not in sunlight
-passenger can't see speedo
