As far as your original choices, though, Vox is perfectly reputable in the wah pedal department, and the Crybaby name is rather legendary. I myself used to use a Crybaby bass wah and never had a problem with it. I think you'll be happy with either choice.
Yeah, like I said, I played the Crybaby 535Q and it sounded nice, but it just didn't let me do the stuff I wanted to with it, and I don't know if that happens with all of Dunlop's wah pedals. I want to be able to control the speed of the wah, it only let me do a really fast "WAAAH! THAT IS ALL I'VE GOT, I WON'T ALLOW YOU TO HOLD YOUR AUDIENCE IN SUSPENSE, YOU JERK, WHY WOULD YOU WANT TO DO THAT" kind of deal.
Regarding that Bad Horsie, I've heard it in use, but I just haven't used it and I know nothing about it. I think that trying an instrument's major sound-altering equipment out is just as important, if not more important than trying the instrument itself out.