I came across an SV6 in Broadbeach, QLD a few weeks back, 487,000km and still going!! It was a lurid jet black with an overkill of red detailing everywhere, but still no complaints from the ex-Nimbin geriatric driving it...
A VF isn't broken-in until around 100 - 120,000km. You'll need routine replacements of things as the car ages (coolant pump, idler pulley; belt can last 250,000km, as the VZ Alloytec (previous car) was heading for... Holden has in the past made some quite impressive statements about the VF engines getting up to 900,000km or so, maintained to the book and looked after (which does not include hooning or mods!). Consider that if you are towing and travelling a lot, that could have some bearing on engine life, especially if it means prolonged increased operating temperatures.