Aw, heck. I knuckled under and bought a Canon 70-200 IS II. It arrived 2 nights ago, so I have not had enough time after work to really try it out very well. I did get some shots of a Cardinal on the porch, but he was not in the best position.

Would still be interested to see that new 120-300 Sigma lens reviewed TDP-style, though. C'mon TDP, what if the result is surprising, and you are the first serious review to discover it?