Anyone who has been using effects for any length of time knows that the Proco Rat is one of the most respected distortion pedals on the market. Did you know that it has its own web site? Check out the history of the different Rat models:
It even has its own Myspace page that is linked from its web site.
The Rat is a heavy-duty fuzzbox that can take a lot of punishment and keep on working. It has a distinctive treble boost distortion that cuts through a cluttered band sound.
Buy one of the Rat pedals and then add some of the mods found in the AMZ eBook to customize it for your rig.