You wanting something heavy or lightish mate? Presuming heavy PE6 or something? Saragosa 18000 will be unbreakable running 80lb with a monster mesh pe6-8 or a second hand tcurve deep jig 400. If you shop around should come in under 500.

Im undecided at the moment, im just unsure as to whether 80lb is needed and i can get away with 50lb, but im open to anyones advice

sambos will kill you , actually catch as many as you can , I have become a magnet for them and every time I get 1 I spend the next 30 minutes recovering on the deck hate the buggers

 haha Petermac I get the same thing years back now helped a 42kg monster onto the deck then the bugger helped me into the water with it on return lol. was only using a penn 24kg rod n a 330gt oh with 50lb mono thats it but it is do able

If you are planning to jig out at the deep spots (100m+) and you want to avoid feeding the sharks more than necessary, I would suggest the heavier 80lb outfit.

You can of course land big ones on a 50lb outfit and lighter, but it takes time, which gives the sharks the time they need to get a free feed.