I can't speak on the Waverly, but have heard only good things. Silverback 11 black is awesome, and you should give it a go! Great for lining, shading, solid fill, and obviously washes out nicely. I keep other blacks around, and since I have been using the Silverback they don't get used much. Also, it is not messy to work with, which is a good point. I used to use Kuro, National triple black, ONE, and Dynamic. Silverback 11 is the best of the bunch, IMO.