no such thing as a dead thread when it comes to music! Well, I suppose I could come up with something, but...
I've owned a large number of wah-wah pedals (actually, still own most of them - don't ask).
The pedal that lives on the pedal board is a Teese RMC-3. I just love this thing, although it took ages to dial in the sound I wanted - make that sounds. I've considered "upgrading" to the one with external controls, but I'm just too cheap, and I don't play out often enough to rationalize the expense<G>!
In the studio I also have a couple of dinosaurs - a Vox Wah from my youth - the one with the picture on the bottom plate, and a Maestro Boomerang. Nothing I've tried can duplicate the sound of either one. So I drag them out from time to time and just have a blast.
While I would heartily recommend anyone shopping for a wah to check out the Teese pedals, like everything else it is a matter of personal preference/taste - there really is no "best" wah. Too bad too!