Dean, you haven't mentioned what fishing you're going to be doing outside of the obvious which is GT fishing and whether you budget of $600 is only for GT lures or meant to cover you for all the lures you may need. On this trip, I'd expect that outside of GT fishing, you may be wanting to throw some smaller lures as well as some jigging.
It looks like you have one GT capable outfit but I wouldn't bother with the PE5 outfit if you were intending to fish for GTs with that. It is just too light.
Steve may have been a but tongue in cheek with his recommendation but unless you're thinking of going with Halcos and River2Sea lures and the odd Heru, you're underdone on your budget. You've picked a pretty expensive trip to go on too so you may want to to think about what budget you want to allocate to this.
Don't forget too that on Nomad that you're going to have to acquire single hooks for your lures which means you need to think about full replacement terminals for all your lures. This adds substantially to the cost of the lures and if you don't get prepared before you go on the boat, well .............. you're going to have to get it on the boat which won't be cheap.