Doing unclipped vs. clipped power testing is probably something you will never see done. Too many variables to take into account, differences in test equipment calibrations etc... Its just not going to be done, and if it did it would likely hurt a lot of peoples feelings so you just aren't going to see it done. I personally don't have the time for such BS but if someone wants to open up a "amp testing firm" then you go right ahead, test EVERYONE's products and post results. Does the SAZ-3000D produce a clean unclipped signal of ~3000 watts into a 1 ohm load? Even I don't know if it can or can do more than that. There are too many variables to take into consideration.
NOW, what you CAN take into consideration is 06salterego's CLAIM of gaining 1.5dB going from a SAZ-3000D to a DD Z1. I am calling BS on that. That is a good test of power output, clipped or unclipped doesn't matter. If he was able to do 1.5dB more with 1 amp vs the other then there is something GREATLY different about the two amps. And I am calling BS because I have seen the insides of both amps, to prove this I will post a pic in a minute, of a DDZ1 on my desk, and there is not that much difference in the guts of the DDZ1 vs the SAZ-3000D. Now there would be a large difference aprox 30% more power output from a DDZ1a than a SAZ-3000D, but NOT the DDZ1.
And screw anyone who says I hug nutz, I don't hug nobodys nutz. Anyone who really knows me or has dealt with me much knows that I am far from a nuthugger and tell it like it is to the best of my own personal knowledge....