I had a Miracle Man many, many, many years ago (...2005 or 2006 I think!) and I wasn't too keen on it I think...
It was in a very similar guitar to this one (both Charvel model series).
I'll listen to those EXCELLENT soundclips on the EXCELLENT new website first, but I think Nailbomb it shall be then... :)
Ok after soundclips:
The NB seems to be just 'richer' sounding than the other two... I listened mostly to the clean clips by the way (just how I do my choice).
The HD is slightly less powerful, a bit warmer in the mids and, indeed, smoother.
The Miracle Man I just preferred a little less... When I had it, I felt it would have needed a guitar with a little more character, something like a neck through all maple or a Les Paul with big maple cap. It'd have brought out the crunch in it.
The Aftermath is a MONSTER. I mean WOW. Who pissed it off so badly?? That thing is pure evil. I loved it...