I know several people that have six lines and are very please with them. There is nothing wrong with active fish only that you get to enjoy them more than boring fish that hide(lol).

Firefish are the worst for jumping out, but personaly never had a six line jump.
They usualy jump if there is a fish bothering it, or even trying to dominate it.
IMO I do not think that you will have any problems if you went this route.