Actually saw the Petrol V6 in the flesh today and had a test drive.
It drove ok, didn't think the V6 would go as well as it does. Unfortunately though it was a bit rough for my liking. Services were randomly every 15-25kms with non specialist dealers and no steel sump upgrade. I asked about trans oil changes and was assured they were done, but couldn't find any evidence to back up.
Together with the fact the newish disc brakes needed to be machined (wheel shaking when breaking, but new discs and brakes) Headlight needed replacement globe, gas struts for bonnet buggered, and a ripped centre storage lid. It just seemed a little unloved and uncared for.
With all this in mind he said he'd do $17,500, but still leaning towards the TDV6 at this stage.

Bookmarks