The Sfocato Fuzz Wah by Robert Keeley is a great pedal that combines a BC109 silicon Fuzz Face circuit with a Vox V846 inspired wah circuit in a single pedal. It will give you the great cocked wah / fuzz combination sound that was made famous by Frank Zappa and, most famously, Mark Knopfler in Dire Straits's Money For Nothing. The wah circuit basically comes in place of a tone control on the fuzz. It will shape the pedal's mid frequency response, exaggerating the frequency band of your choice.