It depends what you're fighting and what role you want it to play. Tank buster, heavy infantry killer, light infantry killer. Tank buster, las cannon/assault cannon for lighter armor. Heavy infantry, assault cannon/auto cannon/plasma cannon. Light infantry heavy bolters/assault cannon.
Chaos weapons can be bought from any of the shops avaible where the Chaos Lords strike. They can also be dropped from any chaos creature.
Eldar by far; they have some of the heaviest weapons and best monstrous constructs in the game.
Tanks, aircraft, poison gas and the Dreadnought Battleship
Defeat Vath
Miniatures: Plastic however some weapons can be bought that are metal 40K Universe: When a great warrior falls with wounds to great for bionics or field surgery they are put into a dreadnought. Where they can continue to serve for the emperor, usually a space marine will do everything they can to protect/save a dreadnought as they can turn the tide of a battle with their bare hands and the powerfull weapons that it holds
Dreadnought - comics - was created in 1967.
Workers' Dreadnought ended in 1924.
Workers' Dreadnought was created in 1914.
supreme staff of arcane, hanzamune dragon koi blade, 1st lord of chaos staff
Dreadnought - book - has 1007 pages.
Dreadnought with a missile launcher and lascannon is 145 points.
Dreadnought - naval wargame - was created in 1975.