What are the main diffences between the GCB95 Original Jim Dunlop wah and the Vox 485 and Vox V487?

And which one do you think I should buy? I think the GCB95.
I play metal and have wah but I want a extra one to maybe mod it and I play metal all of those in the same price.
well if you want to mod it then you might want to consider the Line 6 POD amp modeler. its a neat little modeling device. they go from about 199 to 399. I'd consider saving your money.
i think when he says mod he means like change the electronics, i think it would be harder modding a digital effects than an analog one.