The residual value of the i800 wouldnt be much if you came to sell it. There is not much demand for that vehicle.
The VW Caravelle is what it is a workshouse of sorts.
The Ford Galaxy would be my choice. The choice is a Zetec or Titanium. The Titanium X with the extras like the ad on TV is list price of €52k but I imagine its not new you are looking at so its the previous model.
The Galaxy gets my vote. Stylish and practical.
You know what I prefer and it is quite roomy. The brand new Hyundai iX35. I drove one recently and it is quite roomy, reasonably priced at €26k(straight deal) and very powerful.