Good luck finding a CTX700D, I've only seen 1 show up on Bikesales this year and it was gone within a couple of days.
There are always a couple of DN-01s on sale and they aren't too expensive, but it's a 10 year-old bike and the only thing to ever use that engine and transmission, so it could go bad if something breaks.
The Integra is probably the smart choice as they sold in higher
numbers. I rode on one when they came out and wasn't a fan of the seat
height, but that will depend on how long your legs are.
What I'd love to find is the NC700S motorcycle which had more built-in storage than the Integra in a slimmer body, but I've never seen even one for sale anywhere in Australia :-(
It's crazy that the Aussie market can support a dozen Vespa clones, two dozen Harley clones and innumerable retro cafe racer knock-offs but nobody can make the business case work on something like the NC700S or Aprilia Mana. It's like the less useful a bike is the better it sells...