I wouldn't wait. My experience buying a Lunar Lexon 470 2014 model may be of assistance. I had a Lunar Quasar 462 (2007) and wanted something similar but not with blown air heating which I had heard could be noisy/harder to access. It's a pity manufacturers have done away with the convector fire - but that's progress! The Lexon for 2014 has the Alde system, which I can confirm is great, so we went for one of the last available vans just before 2015 details were announced. Lo and behold the 2015 spec for the Lexon 470 had a change to blown air heating!
So I would advise writing down your must-haves and if a van fits the bill at the right price just go for it! My must-haves were: Status TV aerial, Alde heating and reasonable weights for my Yeti to tow.
Only issue I had with the Lexon is the noseweight which I found tricky to get down to the 80kg limit of the Yeti.