I LOVE wah pedals (I had several, re-sold in some point of time)
Currently: Vox 847 re-issue, Morley Bad Horsie - II and, Roger Mayer's Vision Wah.
Next one: Royal McCoy RMC3
Future: Dunlop Cry Baby (model to decide) and something else. LOL. It's the only pedal, together with boosters, that I like to have several of them available at any time.