I guess Grandis wins in pretty much all categories except resale since the more expensive the car, the bigger hit later on.
Or if youre not really in a rush to get a new minivan, why not wait for the Mazda 5. It was mentioned on the latest C! Magazine cover and they usually feature cars that are either available or going to be launched locally. I'm guessing that Mazda 5 price should be very slightly higher than the top of the line Innova.