I'm going with the 366 meter length until absolute concrete evidence is presented otherwise and no the Blu-Ray picture will not suffice it was just an inflated image of the ship.
I'm going with the 20 meter length because I want it that way.
Seriously, why ignore the obvious ? You can't win against reality, no matter how hard you try.
Random quotes from various ILM staffers won't work either.
Yeah, what do they know, right ? They're only the ones making and scaling the CGI model, after all.