RE: The Block
As far as broadheads go I haven' t found anything that will stand up to the daily grind that broadheads put a target through for any great length of time.
That being said I have had 3 block targets (not counting a ' black hole' ) over the last five years. I would give two of them good ratings. The second one I had never made it through the summer. (It was the smaller of the ones offered.) I was so disappointed in it that I notified the company and told them. The replied by telling me they had gotten some bad material and replaced the target which has held up more in line with what I experienced on the first one. If I was to make a recommendation it would be to get the largest one you can. The extra shooting space helps them to last longer.
As far as the black hole target goes, because it is narrower it stands to reason that it is going to be shot out in no time if one uses it a lot.
I have heard good things about Morrell' s Carbon Six Shooter. That will probably be my next broadhead target to experiment with.