If I were to fish braid with spinners, I suppose I'd lean towards Power Pro. It's what I used when I experimented with the idea. A friend has spoken highly of a "Super 8 or Slick 8 (or something to that effect) braid that he says is the best casting braid he's used.

But, I'm also a mono guy for spinners. 12 lb Izorline with my favorite spinner rod has worked, is working and will continue to work just fine. Can't see jumping on the braid bandwagon just for the sake of it. My method's not broke and I don't need to fix it.