In reply to Dax H: T4 Transporters are cheaper now as more people can stretch to the T5's, depends how far you want to drive it, how fast and in what comfort.
Traffics are good but the Primatstar is the same van but often cheaper as it isn't as well known or popular.
Also depends on what size of van you want, the bigger VW than the transporter (sorry can't remember the model name for the mo) brings vw reliabilty but cos it isn't the fashionable base for camper conversions it is much cheaper. This is what I am likely to go for when I move on from my current T4.