Your rock option looks real pretty and would be a benefit, but I would get some larger rock too. Adding larger rock in the 6 to 12" range (50/50 mix with the 2-6") will be better for steeper slopes. These larger rocks will help keep your investment from migrating towards the bottom of the pond. Look at my 1st and 3rd pic...you can see that I ran a row of larger rock first in deeper water and then added the smaller rock uphill from that. This row of larger rock acts like a barrier to the smaller rock.

Fish on!,
Noel