Double-breasted is the freshest power statement that is slowly slipping into the Aussie market. I would never wear it as a full suit (unless its for a formal occasion) but that doesn't mean you cant break it down. First keep the tailoring as a loose fit you don't want it to be too fitted or it will pull in all sorts of awkward places. A traditional double breast jacket with a wide peak lapel is perfect to emphasises your chest and shoulders to give you a more masculine shape. always op for a thicker tie to keep your proportions sleek or for a toned down look use a shirt with a high collar.