I have 8#, 10# and 12# line on my Spanish rigs. I haul most of them over the rail but if in doubt, I holler for a net. And am always ready to put my rig down and net one for someone else too.
IMO, 14# is overkill but you can easily haul a 5# Spanish over the rail if you really want too. I am more worried about the hook ripping out than the line breaking.