Hi David
I have the Lunar Zenith(6) and have had no prolems with it so far,its a 2004. It is an entry level van,very good value for money I feel, spec wise there are six of us and we all manage along comfortably, I think the higher spec the more gizmo's you get, i.e alloy wheels, radio's ,more sockets etc etc, although I believe you can get dealer specials that upgrade.Fitted a remote sensor for the electric heater as it was cutting out,this was supplied free from truma and cured the problem .Ranger I think is pretty much the same spec but different colours. Mine is 1300kg and has never been any trouble towing, very happy with it !
Tina x