Looks really good - the layout and styling is similar to what Three Bridge Campers offer - you do get a lot more floor space by having the seat so far back but this comes, as you say, at the expense of storage behind the seats. One thing you could consider once you've used the van, and decided if you do need more storage space, is upgrading the seat bed for something on sliding rails so you can pull it forward to create space behind (I'm not sure how practical this would be to retrofit as I think the rails have to be bolted through from underneath the floor?).
Happy camping - enjoy!!
The sliding rails would have been the answer...hey ho, that's what comes of diving in with absolutely no idea...will just have to travel with it all piled up in the living space...it will only be me and Phoebe travelling most of the time, so it's no biggie.