There's only a $100.- price difference between a normal one and the White Lightning. Replacing the volume pot seems to be a tricky operation and a new speaker isn't cheap.
I think the difference in the price between upgrading my normal HRDLX vs. trading it in for a new White Lightning would be minimal. Plus, I would have something special and limited. Only 800 are built.
But I'm not sure these amps are available on this side of the big pond.