The wah pedals i have owned: Dunlop Crybaby, Ibanez Wheeping Demon, Morley Bad Horsie Original, and now the Dunlop Zakk wylde.
Dunlop Crybaby sounds great, but to me it didnt have enough sweep range.
Ibanez Wheeping Demon, Huge sweep, very adjustible, but it sounded digital to me.
Morley Bad Horsie, Not enough sweep.
Zakk Wylde wah, way thicker than the original crybaby with an extended sweep. I love it.
You just need to try as many out as you can and make your decision, everything sounds different to everybody.