*sigh*. Don't buy any digi-tech pedals. And you sure as hell better not buy any pedal with "Metal" in it!!! The best distortions i've ever used are the Ibanez TS-9 (9! not 7!) Tubescreamer, which is the best classic rock pedal, period, and also the BOSS Ds-1 is a great rock/metal pedal. It sounds great for Nirvana stuff, in fact, Kurt used one of those whilst recording Nevermind. And, the rest just depends on your guitar/amp. But, for the love of God, don't get any Metal pedals. And welcome to the site!