Dave,
we run a vauxhall vivaro sportive and have had it 4 years no probs, its the lwb version and that extra space makes all the difference, room for extra porty and rotary etc.
Ours is the 6 speed gear box and i think they have a lot less trouble than the earleir 5 speed box.
The only thing i wish is that is was the semi high top, as it makes servicing the tm a bit of a nigtmare trying to stick your head above the waste tank to clean filters etc.
One thing i liked about the vivaro is that the driving experience is more akin to a car than most vans which gives lot more comfort on long journeys or long days working.
Regards
Steve