DarthTom said:
I think your poll is missing the most important option, the Simitar in ST Nemesis. Then again a lot of people don't consider Nemesis to be Trek canon because it was such a terrible film.
It's not that the film isn't canon, it's just that the Scimitar is just another one of those Trek film superweapons which is never seen or heard from again because it gives one particular group too much power. Like the Genesis Device, or Chang's BoP that could fire when cloaked. More of a one-off than the other ships on the list.
However, I don't disagree that it would probably kick the ass of anything on that list, if only for it's cloaking system and massive firepower - it's a Mary Sue in Starship form.