After decades of trying every pedal out there, from $700 and down, I finally found one that I adore. These pedals are no longer in production, but for a limited time, you can get them used and new... CHEAP!
They range in tone from full bore crunch, destruction, to subtle overdrive, and their EQ is AWESOME!!!! It lets you dial in what you want, and where you want it.
These were made for guitar, but they work perfect on bass, and it's the richest, most saturated distortion that I've ever heard, including the pedals with Tubes, which I've also tried.
On tight, it's got scalpel precision and on loose, it's puts out a demonic, sustained explosion of tone.
Digitech Hardwire Tl-2 Metal Distortion