You're comparing apples to oranges.
They each have their advantages.
Are you a palm or claw mouse users? This means do you have your palm on the mouse or do you hold your hand above the mouse like a claw. Personally I'm a palm user.
I've personally had the DeathAdder, G500 and Naga.
Buying a mouse is like buying clothes - you really need to try it on to make sure it fits you.
The DeathAdder is ok but too light for my liking. The Naga is too small and too light.
I love my G500 with all the weights installed.