I've seen them corroded out and grounding themselves a bunch of times when I worked at Advance, and heard lots of people bitch about them. I'd say just think about it: it only takes one spark to ignite the gasses so I guess a dual spark plug might make a slight difference but 4 is just overkill. I also put them in my supercoupe back in the day and the only difference I felt was my wallet getting $5.99 lighter per plug.
I'd say NGK, Splitfire, or Bosh platinum 2 are pleanty enough for anything.