Huck is way bigger than either of those guys, as was said it's the biggest leap between divisions in boxing by far. Aside from Roy Jones(who passed the CW division), when is the last time anyone moved up from 175 to be successful there? Bob Foster? Michael Moorer? It's certainly a hell of a feat. If Stevenson or Kovalev unify 175 and want to move up in a couple years power to them, but for now why bother.