Get OEM pads.
The USA does not require aftermarket brake pad certification testing. Only OEM pads are tested for correct anti-lock brake performance unless you see Federal Motor Vehicle Safety Standards (FMVSS) certification on the box.
I'm a big fan of lyndall "z" brake pads as well, I tried the Gold and didn't like them. If you are not a fan of brake dust on your wheels do a search of lyndall brake pads, most Harley dealers I've been to sell them as well.