answering the original question...if you have to ask, then you haven't put enough rounds through one yet. They are addicting.
Nick, how much money did it cost to do all that? Did you pay a gunsmith to do it? If not, how did you learn? I'm all for purist, but heck, why not get a half dozen of the things and modify just one? How did you learn to do all that stuff? Could you put links up?