Digitech Death Metal

Well I don't know if grunge is supposed to be clean.

I did check into what metal bands use and the most common thing is a triple rectifier, which is WAY too expensive.

I do know that Kurt Cobain used the DS-1 though. And I prefer pedals. More control, easy layout. My amp has some built in stuff but I hate it. I have nothing against the sound but running to my amp to turn them on is a pain. Plus I can't switch them on mid song.

I wrote clear not clean. clean would be no distortion. clear sorta defines the crispess of the metal I hear. not confused and mushy.

have you looked into a Big Muff pedal. they are an old standard for cool harmonic distortions.
it was used for Fuzz too. it's made by ElectroHarmonix and goes for around 75$.