Hey, i've recently picked up soldering and put my pickups in, I'm planning on changing my speaker... well, it is kind of turning in a obsession

And now I'm looking for a cheap wah which I will mod the hell out of it. Which one would be the most appropriate and the cheapest? I don't care for the stock sound, as I will mod it to my tastes.

So which one? Some sort of crybaby? Anything else? Just tell me
You could try going to a repair shop and getting a cheap shell of an old wah, and then just build the circuit yourself. And I'm pretty sure that you can buy just the shell from Dunlop. I bought and modded a Crybaby just because the shell was rugged, and because they're not terribly expensive.