I always use a Floro leader with braid; but not so much for line visibility issue. I use it for abrasion resistance. If you are fishing rocks or heavy brush a floro leader will take the abuse much better than straight braid. Braid and rocks are a no-no, and heavy brush will weaken your braid as well, especially at the knot. using a bead on your line will also help the weight from pounding you knot on straight braid when T-rigging.