Hi K-H, As you know, the bird-man knows that lens better than anyone out there.
I look forward to your comparison. The 180/3.4 you mention though a true APO is not as sharp as the 280/4 APO (with the 280/4 being in a league of its own- the 180 is *very sharp* by most standards). It will be interesting to see how these pan out.
Incidentally, I believe yours is the longest lens tested with the SB! Most of the original tests (AFAIK) were done with normals, wides and medium teles.
I am still waiting for mine. The longest lens I currently have to test would be a 200/3.5 AF Nikkor (from F3AF). I got rid off all the long, heavy ones a while ago to stick with compact ones.