I think the metal zone is too much for zeppelin. If you want their sound. I would suggest you check into one of marshalls pedals. Perhaps a marshall Guv'ner II. That should be good enough. If you play more sixties rock get a fuzz pedal, like the US big muff. If you play more 70's, get the guvnor. Or if you only have $40 get the ds-1. I have one but it sounds too lo-fi for me. Its good for grunge and punk.