Hi! We have a Ventura 170X... a 2010. First, they aren't made anymore. 2009/2010s were the last production run by Thor. I think they were discontinued (a mistake IMHO) because of the slow down in the RV industry; a re-alignment of product lines; and a reorganization of Thor. They wanted to concentrate on 'Big B's' and high end coaches.
We spent a lot of time looking at floor plans and options available on different Sprinter based models. The bottom line I think, is that you have a choice of about 3 different plans that the manufacturer has tweeked a tiny bit. The interiors appear to be production runs by an outside vendor, the only variances are the type of wood, furnishings and details, as you can find a similar layout, style, and fitment across manufacturers... only the details change. From a practical view, there's only so many ways you can 'slice and dice' the interior of one of these vans and to keep the costs down they farmed out the construction of the interiors.
Our Ventura is fitted and finished better than average with high quality materials .... they had one on the lot that would have taken a year to bring up to high standard (as my father-in-law would have said.... 'it came as a kit... all the parts in a box' ... so the quality varies across lines and within lines.
There's been on issues with the RV so far and we've had it a year, other than the fact that unless you live in Canada, you will need at least a 13.5K BTU A/C unit to keep it comfortable in the south, mid-west and western states... no matter the brand. the dealer replaced our 9K something unit with a Mach 3 PS for free .... more cooling, more air circulation... LESS POWER required! Yeah! And going along with that you need the on board generator to power the a/c while you are on the move as its going to get pretty stuffy sometimes without both units working while on the road.
Fresh, grey, black water capacities are adequate for two w/ dogs on a trip. But, again, we don't carry much black/grey if we don't have to.
You need to pack carefully and figure out where to stow things (like a boat?) to maximize the space available.... which is considerably more than our 17' TT.