Hi Dave,
It depends on what kind of work you do and how much material you carry.
Vans are the cheapest if you don't carry too much stuff. The new sprinters are working out great for alot of companies that I know. We use a box type truck from Hackney bodies. The site below has a gallery that you can look at the trucks and bodies. They are not real cheap, but they hold alot of parts and tools.
Hackneyplumbing.com
