With a WAV it is less about the van but more about the quality of the conversion.
I have driven a (last gen) Renault Traffic WAV and it drove like a Van with all the rattles and bangs you would expect. I have driven a Volkswagen Transporter Van WAV conversion that started life as a panel van with windows inserted and carpet stuck to the walls. It also drove like a van. If one can afford it then a VW Caravelle WAV (or new version) with a side cassette lift drives like the luxury people carrier it is.