4 x 6 is a large print, DSLRs with macro lenses can capture images like that with extremely high resolution and dynamic range, allowing for more detail in both the highlights and shadows. If you know anyone with such a camera, definitely go that...
I did not override the 500m max limit, got to 400m before I chickened out due to the already highish altitude and the wind could have changed at any point during the sunrise.
I can't find the log data for the over 4000m flight, but you do not...