As far as barracuda, the following should do fine:
1. Rod - 8.5' St. Croix Premier Series Surf Rod (PSRC86M2)
2. Reel - An Abu 6500 sized reel with 14 lb mono.
I haven't caught a lot of barracuda, but 1 decent sized one. They are fast after hooking, but less powerfull. Also, from what I have heard from an experienced Barramundi fisherman, the above combo should do fine with Barramundi too.
If you go up a little heavier, you won't have much fun landing a Cuda. This setup might kill the fish after a long fight.....