That depends what you want from the bridge pup and neck pup.
I choose to mix pickups, Nailbomb bridge and Mule Neck.
The pickups are great for what I want them to do. Great metal tone form the Nailbomb, and a sweet-sounding overdriven neck pickup that handles cleans above anything else ive tried.
The only problem though, is when I use both pups at the same time. They dont match, at all, really. Im not disappointed with my choise, but will go for a calbrated set, so I can get a better pickup configuration.