If your chasing marlin out of sydney then get yourself good quality lures. Spend the extra money on pakula's, magoo's, topguns or hollowpoints. They will cost you a bit more but pakula's especially are very easy to work in a spread and you will catch more fish. If you are fishing 15kg then the cockroach, medium sprocket or phantom in lumo,evil,stripy,wasp or fuzz are all excellent colours. Don't spend all day and $150.00 in fuel pulling cheap nasty lures around the ocean when a few extra bucks first up will have you enjoying the great marlin fishing that sydney has to offer.
Cheers Shane.