No question, Dahak from David Weber's Empire from the Ashes
Pyromaniac1337 said:
A completed Death Star II
Impenetrable armour? Check
Gazillions of lasers that can blow up even the smallest of vessels? Check
Planet and huge ship-destroying super laser that can charge in 30 minutes? Check
Facilities to house, train, and arm a thousand Coruscant's? Check
Fuck you Hell, I have the big guns.
You think the Death Star is scary?
Dahak is 3200 km in diameter (that's roughly the size of our MOON, making the DS look like a tic-tac)
It can travel thousands of times the speed of light (hyperspace) and 70% the speed of light (sublight).
It can fire missiles that also travel thousands times the speed of light and hit a target from across a star system (and destroy them by causing a tear in space at the location).
It has MULTIPLE Death Star planet-destroyer equivalent lasers
It can house a few million cybernetically enhanced individuals
And last but not least, it is the home base for a fleet of hundreds of fighters, bombers, transports, repair ships, and 80,000 ton warships.
Yea, I think the Death Star be my *****.
edit: Oh yeah, Dahak is also controlled by a huge self-aware computer (of the same name) that than control the entire thing with such speed and precision that no organic being could ever compare