Iveco is the way to go I think. Same engine as the daf in the later models. The new Eurocargo looks great 2004 onwards. I use meridian motors in kent. www.meridian-motors.co.uk. Never had a problem. Just make sure you choose a nice chassis for your box otherwise you will regret it later on.
I have always found Iveco to be the best for chassis, the later models share the same engine as the daf, the iveco is more reliable and the parts are cheaper and easier to get hold of. I use meridian motors in kent for my chassis never had a problem