We fished 7's and 8's. Can't say enough good things about Sage 1 rods. Holy crap those are sweet rods. I wouldn't attempt a 5 weight in salt unless you are in a boat. Could you land these fish on a 5wt? Yes. Could you handle the small flies we threw? Yes. But I feel pretty strongly about not going too light for fish you are going to release.
And we threw very small flies. Tiny bluegill sized poppers, an orange and tan muddler (ugly muddler) and a small mayan ciclid imitation. All three got eaten. It was all sight fishing. I will be back.
I'm in Fort Lauderdale for work. I hope that storm let's me out of here.