Depends a bit whether you plan to cast lures in heavy timber and need to stop fish fast, or whether you plan to troll in open water. I reckon most people go way overgunned on barra gear, and honestly it is not necessary. Same goes for leaders.
The main problem you have in using a little 3000 size reel is line capacity, you might only get 100-150 m of 40 lb braid on it.
To give you an idea of what is easily possible, I caught 6 barra in 3 days from around 70 cm up to 97 cm trolling lures on 6 and 4 kg mono in shallow water close to weedbeds. I was using 60 lb black magic leader. I lost 2-3 other fish all due to them throwing the lures. None of them busted the line or took me around any trees.
Point I am trying to make is - you don't need heavy braid and heavy twisted leaders to land barra - unless you are in heavy timber.
"Don't believe the type"
Jeremy