Thanks for the all great feedback on this topic everyone
It sounds like if going for the diesel finding one that has done highways kms will help minimise the risk of future DPF failure. My commute is around 45mins to an hour of driving (with at least 20mins of that at 100km/h) so keeping the dpf healthy shouldn't be an issue for me.
I didn't know it was the same engine as the x-trail, so thanks for that tidbit.
This car would be pretty much used for commuting 90% of the time, so I don't think I would miss a minor reduction in ultimate performance and handling from the 225.
Next step is to test drive one, I'll post some feedback once I have done that.
Looking at redbook and prices on carsales, it seems I should be able to get a good one for around the $9-$10k mark ?