You'll have good results with quite a few, but here's the two industry standards for what you're looking for.
Expensive Teese Wizard.
http://www.realmccoycustom.com/WIZARDWAH.htm
Less expensive Dunlop Dime Wah.
http://www.jimdunlop.com/product/db01-dimebag-signature-wah
There's also this:
http://www.homebrewelectronics.com/product/michael-amott-signature-wah-2
Not so fond of the splatter but it sounds amazing.
The Kirk Hammett Wah is it for sure. It's so good he can't do a solo without it!