I think I narrowed it down to these:

1: Digitech Death Metal
2: Boss MT-2 Metal Zone
3: Line 6 Uber Metal

If you read the names of the pedals it's probably pretty obvious that I want a death metal sound! Now I went to the websites of these 3 pedals and heard a sample of what each sounded like... I liked the Digitech the best but it's also the cheapest of the three pedals, so I was wondering if maybe the sound sample may have been a little... misleading. have any of you guys tried these pedals? I'm also open to suggestions if you think you know of a pedal better than any of these.