I'm really happy with my Fiat Ducato, faster than my Transit and pulls better, holds more weight, slightly bigger and £4500 cheaper.
Had a Toyota that was a nice van also VW seriously under powered and expensive to have work done on things were 2 the price, Merc was great but too expensive to buy and watch depreciate even my accountant said it was shameful having that much van and so much depreciation also expensive parts albeit they didn't wear out no where near as fast as the VW.
I think it depends on costs and how long you want your van to last, I get rid after 4 years anyway, I'd like a test of the new Hyundai H2, they have the H1 out now but it has 4 seats but I saw the H2 on one of those secret websites and it looks good.
Shaun