Hey, I have a Jackson DK2 and I'm swapping out the two remaining single coil pickups for some new ones and I had a few questions.(I have an EMG-81 in the bridge)

1. I'm trying to get a Vai sound so would a Breed or Evolution work?(if you know of a better one I'd love to know)

2. This is kinda a newbish question, but I'm not sure if I should buy them F-spaced or not.(any help on this would be appreciated)