Hey Clover. We have a diesel GQ Patrol, and you don't need a turbo to blitz anything. Ours is tuned differently to standard, and will thrash (can I say that?) pretty much all the other 4wds in our group. We have a 4wd mechanic shop, so the Man is the one with all the answers. I can give you some points, but would have to ask him for the reasons behind them, 'cos I just forget the details! Like don't get a Jackaroo or an Explorer. There are good GU Patrols around for under $10k I think, and I'm pretty sure parts are a little cheaper than for a late model Cruiser. Oh, don't get a Discovery, unless you like having to pay through the nose for parts.
I will pm you...