I ran a Combo 1.3CDTi a few years ago and that was a cracking little van, it was far more car like and refined than many of the alternatives and the engine was a nice unit. Or the old Berlingos are reasonable as already mentioned.
Had a caddy for 6 years never let me down , Renault/Citroen vans before didn't like them slow, need fixing every 2 mths of use therefore expensive to maintain.
My vote goes for the VW caddy TDi, if you can spend a little more this would be my bet.