Petrol vs Diesel:
If Diesel's price is on the rise, then it wouldn't matter much, you still gotta pay to make it run.
But if Diesel has a better fuel economy then go for that.
If you are more familiar with the QD32ETI and know of maintenance / support then go for that.
Well yes, I was not saying the Elgrand is a 350Z but same engine, so was just seeing it from parts point of view
If you need more room then what the Stagea's got then the Elgrand would be perfect.