The Metal Zone might have a "nasally" tone to it on its own, but in a mix, that nasally tone is what will make you stand out and be heard. It's easily dialed out though, if you just take your time with it, and experiment. You might also want to check out the DigiTech Metal Master. It's supposed to be able to sound like several different types of distortion pedals. The best thing you can do is go to a music store and try some pedals out yourself.