Something for fishing around Darwin then not Melbourne, totally different beasts. Firstly something with a 4 stroke as you'll end up doing lots of K's on the rivers hunting Barra. Etec's are not popular in Darwin. There are a lot of zuks and other 4 strokes.
Popular around Darwin are side / center consoles for good all round access. A mate in Darwin just sold his stacer 4.8 with a 60 4 stroke that would've suited those requirements. He got around 17k for it fully tricked up. A live bait tank is very handy up there. A 4.8 is big enough for off shore trips and you can also chuck in a few swags and sleep on them overnight which a lot do there.
Make sure your trailer is a good one as it will get a very hard workout on the things they call roads around there.
Definitely an alloy not glass.
http://fishingterritory.com/fishing-...or-t25296.html Thats a fairly typical Darwin boat.