I vote bornholm aswell.
Stats:
Area about 280km^2
Heightmap resolution in terrain 5.5 metres
Island Measures a span of 20km x 14km
Terrain 22 x 22km
Height is between -30 to 182m with a lot of elevation changes
About 1.75 million objects scattered nicely across the entire island.
800+ compounds/farms
31 cities, villages and towns
Large forests, large open fields, narrow cities, lots of hills, crests and valleys