Let's close the voting... I think we have a clear winner:
Landis' escape on Stage 17 of the Tour
Unfortunately, this choice will foster more debate than it ends, but for the crowd that would prefer to forget about Floyd, second place Paris-Roubaix edged out Liege-Bastogne-Liege by a single vote. In the world of imprecise online polling, consider that a virtual tie.
aside: Roger Hammond's chat with Cycle Sport includes the suggestion that Grand Tour DS's don't necessarily translate into Classics DS's. An interesting thought: Disco built a great roster for this April, but in retrospect all the extreme tactical patience that they learned in July didn't necessarily help them when, say, Cancellara bolted the field.